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Albert, the Swabian, rightly called the Great, was the founder of modern science. He did more than any other man to prepare that process, which has turned the alchemist into the chemist, and the astrologer into the astronomer. It is odd that, having been in his time, in this sense almost the first astronomer, he now lingers in legend almost as the last astrologer. Serious historians are abandoning the absurd notion that the mediaeval Church persecuted all scientists as wizards. It is very nearly the opposite of the truth. The world sometimes persecuted them as wizards, and sometimes ran after them as wizards; the sort of pursuing that is the reverse of persecuting. The Church alone regarded them really and solely as scientists. Many an enquiring cleric was charged with mere magic in making his lenses and mirrors; he was charged by his rude and rustic neighbours; and would probably have been charged in exactly the same way if they had been Pagan neighbours or Puritan neighbours or Seventh-Day Adventist neighbours. But even then he stood a better chance when judged by the Papacy, than if he had been merely lynched by the laity. The Catholic Pontiff did not denounce Albertus Magnus as a magician. It was the half-heathen tribes of the north who admired him as a magician. It is the half-heathen tribes of the industrial towns today, the readers of cheap dream-books, and quack pamphlets, and newspaper prophets, who still admire him as an astrologer. It is admitted that the range of his recorded knowledge, of strictly material and mechanical facts, was amazing in a man of his time. It is true that, in most other cases, there was a certain limitation to the data of medieval science; but this certainly had nothing to do with medieval religion. For the data of Aristotle, and the great Greek civilisation, were in many ways more limited still. But it is not really so much a question of access to the facts, as of attitude to the facts. Most of the Schoolmen, if informed by the only informants they had that a unicorn has one horn or a salamander lives in the fire, still used it more as an illustration of logic than an incident of life. What they really said was, "If a Unicorn has one horn, two unicorns have as many horns as one cow." And that has not one inch the less a fact because the unicorn is a fable. But with Albertus in medieval times, as with Aristotle in ancient times, there did begin something like the idea of emphasising the question: "But does the unicorn only have one horn or the salamander a fire instead of a fireside?" Doubtless when the social and geographical limits of medieval life began to allow them to search the fire for salamanders or the desert for unicorns, they had to modify many of their scientific ideas. A fact which will expose them to the very proper scorn of a generation of scientists which has just discovered that Newton is nonsense, that space is limited, and that there is no such thing as an atom.

This great German, known in his most famous period as a professor in Paris, was previously for some time professor at Cologne. In that beautiful Roman city, there gathered round him in thousands the lovers of that extraordinary life; the student life of the Middle Ages. They came together in great groups called Nations; and the fact illustrates very well the difference between medieval nationalism and modern nationalism. For although there might any morning be a brawl between the Spanish students and the Scottish students, or between the Flemish and the French, and swords flash or stones fly on the most purely patriotic principles, the fact remains that they had all come to the same school to learn the same philosophy. And though that might not prevent the starting of a quarrel, it might have a great deal to do with the ending of it. Before these motley groups of men from the ends of the earth, the father of science unrolled his scroll of strange wisdom; of sun and comet, of fish and bird. He was an Aristotelian developing, as it were, the one experimental hint of Aristotle; and in this he was entirely original. He cared less to be original about the deeper matters of men and morals; about which he was content to hand on a decent and Christianised Aristotelianism; he was even in a sense ready to compromise upon the merely metaphysical issue of the Nominalists and the Realists. He would never have maintained alone the great war that was coming, for a balanced and humanised Christianity; but when it came, he was entirely on its side. He was called the Universal Doctor, because of the range of his scientific studies; yet he was in truth a specialist. The popular legend is never quite wrong; if a man of science is a magician, he was a magician. And the man of science has always been much more of a magician than the priest; since he would "control the elements" rather than submit to the Spirit who is more elementary than the elements.

Among the students thronging into the lecture-rooms there was one student, conspicuous by his tall and bulky figure, and completely failing or refusing to be conspicuous for anything else. He was so dumb in the debates that his fellows began to assume an American significance in the word dumbness; for in that land it is a synonym for dullness. It is clear that, before long, even his imposing stature began to have only the ignominious immensity of the big boy left behind in the lowest form. He was called the Dumb Ox. He was the object, not merely of mockery, but of pity. One good-natured student pitied him so much as to try to help him with his lessons, going over the elements of logic like an alphabet in a horn-book. The dunce thanked him with pathetic politeness; and the philanthropist went on swimmingly, till he came to a passage about which he was himself a little doubtful; about which, in point of fact, he was wrong. Whereupon the dunce, with every appearance of embarrassment and disturbance, pointed out a possible solution which happened to be right. The benevolent student was left staring, as at a monster, at this mysterious lump of ignorance and intelligence; and strange whispers began to run round the schools.

A regular religious biographer of Thomas Aquinas (who, needless to say, was the dunce in question) has said that by the end of this interview "his love of truth overcame his humility"; which, properly understood, is precisely true. But it does not, in the secondary psychological and social sense, describe all the welter of elements that went on within that massive head. All the relatively few anecdotes about Aquinas have a very peculiar vividness if we visualise the type of man; and this is an excellent example. Amid those elements was something of the difficulty which the generalising intellect has in adapting itself suddenly to a tiny detail of daily life; there was something of the shyness of really well-bred people about showing off; there was something even, perhaps, of that queer paralysis, and temptation to prefer even misunderstandings to long explanations, which led Sir James Barrie, in his amusing sketch, to allow himself to be saddled with a Brother Henry he never possessed, rather than exert himself to put in a word of warning. These other elements doubtless worked with the very extraordinary humility of this very extraordinary man; but another element worked with his equally unquestionable "love of truth" in bringing the misunderstanding to an end. It is an element that must never be left out of the make-up of St. Thomas. However dreamy or distracted or immersed in theories he might be, he had any amount of Common Sense; and by the time it came, not only to being taught, but to being taught wrong, there was something in him that said sharply, "Oh, this has got to stop!"

It seems probable that it was Albertus Magnus himself, the lecturer and learned teacher of all these youths, who first suspected something of the kind. He gave Thomas small jobs to do, of annotation or exposition; he persuaded him to banish his bashfulness so as to take part in at least one debate. He was a very shrewd old man and had studied the habits of other animals besides the salamander and the unicorn. He had studied many specimens of the most monstrous of all monstrosities; that is called Man. He knew the signs and marks of the sort of man, who is in an innocent way something of a monster among men. He was too good a schoolmaster not to know that the dunce is not always a dunce. He learned with amusement that this dunce had been nicknamed the Dumb Ox by his school-fellows. All that is natural enough; but it does not take away the savour of something rather strange and symbolic, about the extraordinary emphasis with which he spoke at last. For Aquinas was still generally known only as one obscure and obstinately unresponsive pupil, among many more brilliant and promising pupils, when the great Albert broke silence with his famous cry and prophecy; "You call him a Dumb Ox: I tell you this Dumb Ox shall bellow so loud that his bellowings will fill the world".

To Albertus Magnus. as to Aristotle or Augustine or any number of other and older teachers, St. Thomas was always ready, with the hearty sort of humility, to give thanks for all his thinking. None the less, his own thinking was an advance on Albertus and the other Aristotelians, just as it was an advance on Augustine and the Augustinians. Albert had drawn attention to the direct study of natural facts, if only through fables like the unicorn and the salamander but the monster called Man awaited a much more subtle and flexible vivi-section. The two men, however, became close friends and their friendship counts for a great deal in this central fight of the Middle Ages. For, as we shall see, the rehabilitation of Aristotle was a revolution almost as revolutionary as the exaltation of Dominic and Francis; and St. Thomas was destined to play a striking part in both.

It will be realised that the Aquino family had ultimately abandoned its avenging pursuit of its ugly duckling; who, as a black friar, should perhaps be called its black sheep. Of that escape some picturesque stories are told. The black sheep generally profits at last by quarrels among the white sheep of a family. They begin by quarrelling with him, but they end by quarrelling with each other. There is a rather confusing account concerning which members of his family came over to his side, while he was still imprisoned in the tower. But it is a fact that he was very fond of his sisters, and therefore probably not a fable that it was they who engineered his escape. According to the story, they rigged up a rope to the top of the tower, attached to a big basket, and it must have been rather a big basket if he was indeed lowered in this fashion from his prison, and escaped into the world. Anyhow, he did escape by energy, external or internal. But it was only an individual energy. The world was still pursuing and persecuting the Friars, quite as much as when they fled along the road to Rome. Thomas Aquinas had the good fortune to gather under the shadow of the one great outstanding Friar, whose respectability it was difficult to dispute, the learned and orthodox Albertus; but even he and his were soon troubled by the growing storm that threatened the new popular movements in the Church. Albertus was summoned to Paris, to receive the degree of a Doctor; but everyone knew that every move in that game had the character of a challenge. He made only the request, which probably looked like an eccentric request, that he should take his Dumb Ox with him. They set out, like ordinary Friars or along religious vagabonds; they slept in such monasteries as they could find; and finally in the monastery of St. James in Paris, where Thomas met another Friar who was also another friend.

Perhaps under the shadow of the storm that menaced all Friars, Bonaventure, the Franciscan, grew into so great a friendship with Thomas the Dominican, that their contemporaries compared them to David and Jonathan. The point is of some interest; because it would be quite easy to represent the Franciscan and the Dominican as flatly contradicting each other. The Franciscan may be represented as the Father of all the Mystics; and the Mystics can be represented as men who maintain that the final fruition or joy of the soul is rather a sensation than a thought. The motto of the Mystics has always been, "Taste and see". Now St. Thomas also began by saving, "Taste and see"; but he said it of the first rudimentary impressions of the human animal. It might well be maintained that the Franciscan puts Taste last and the Dominican puts it first. It might be said that the Thomist begins with something solid like the taste of an apple, and afterwards deduces a divine life for the intellect; while the Mystic exhausts the intellect first, and says finally that the sense of God is something like the taste of an apple. A common enemy might claim that St. Thomas begins with the taste of fruit and St. Bonaventure ends with the taste of fruit. But they are both right; if I may say so, it is a privilege of people who contradict each other in their cosmos to be both right. The Mystic is right in saying that the relation of God and Man is essentially a love-story; the pattern and type of all love-stories. The Dominican rationalist is equally right in saying that the intellect is at home in the topmost heavens; and that the appetite for truth may outlast and even devour all the duller appetites of man.

At the moment Aquinas and Bonaventure were encouraged in the possibility that they were both right; by the almost universal agreement that they were both wrong. It was in any case a time of wild disturbance, and, as is common in such times, those who were trying to put things right were most vigorously accused of putting things wrong. Nobody knew who would win in that welter: Islam, or the Manichees of the Midi; or the two-faced and mocking Emperor; or the Crusades; or the old Orders of Christendom. But some men had a very vivid feeling that everything was breaking up; and that all the recent experiments or excesses were part of the same social dissolution; and there were two things that such men regarded as signs of ruin; one was the awful apparition of Aristotle out of the East, a sort of Greek god supported by Arabian worshippers; and the other was the new freedom of the Friars. It was the opening of the monastery and the scattering of the monks to wander over the world. The general feeling that they wandered like sparks from a furnace hitherto contained; the furnace of the abnormal love of God: the sense that they would utterly unbalance the common people with the counsels of perfection; that they would drift into being demagogues; all this finally burst out in a famous book called The Perils of the Latter Times, by a furious reactionary, William de St. Amour. It challenged the French King and the Pope, so that they established an enquiry. And Aquinas and Bonaventure, the two incongruous friends, with their respectively topsy-turvy universes, went up to Rome together, to defend the freedom of the Friars.

Thomas Aquinas defended the great vow of his youth, for freedom and for the poor; and it was probably the topmost moment of his generally triumphant career; for he turned back the whole backward movement of his time. Responsible authorities have said that, but for him, the whole great popular movement of the Friars might have been destroyed. With this popular victory the shy and awkward student finally becomes a historical character and a public man. After that, he was identified with the Mendicant Orders. But while St. Thomas may be said to have made his name in the defence of the Mendicant Orders against the reactionaries, who took the same view of them as his own family had taken, there is generally a difference between a man making his name and a man really doing his work. The work of Thomas Aquinas was yet to come; but less shrewd observers than he could already see that it was coming. Broadly speaking, the danger was the danger of the orthodox, or those who too easily identify the old order with the orthodox, forcing a final and conclusive condemnation of Aristotle. There had already been rash and random condemnations to that effect, issued here and there, and the pressure of the narrower Augustinians upon the Pope and the principal judges became daily more pressing. The peril had appeared, not unnaturally, because of the historical and geographical accident of the Moslem proximity to the culture of Byzantium. The Arabs had got hold of the Greek manuscripts before the Latins who were the true heirs of the Greeks. And Moslems, though not very orthodox Moslems, were turning Aristotle into a pantheist philosophy still less acceptable to orthodox Christians. This second controversy, however, requires more explanation than the first. As is remarked on an introductory page, most modern people do know that St. Francis at least was a liberator of large sympathies; that, whatever their positive view of medievalism, the Friars were in a relative sense a popular movement, pointing to greater fraternity and freedom; and a very little further information would inform them that this was every bit as true of the Dominican as of the Franciscan Friars. Nobody now is particularly likely to start up in defence of feudal abbots or fixed and stationary monks, against such impudent innovators as St. Francis and St. Thomas. We may therefore be allowed to summarise briefly the great debate about the Friars, though it shook all Christendom in its day. But the greater debate about Aristotle presents a greater difficulty; because there are modern misconceptions about it which can only be approached with a little more elaboration.

Perhaps there is really no such thing as a Revolution recorded in history. What happened was always a Counter-Revolution. Men were always rebelling against the last rebels; or even repenting of the last rebellion. This could be seen in the most casual contemporary fashions, if the fashionable mind had not fallen into the habit of seeing the very latest rebel as rebelling against all ages at once. The Modern Girl with the lipstick and the cocktail is as much a rebel against the Woman's Rights Woman of the '80's, with her stiff stick-up collars and strict teetotalism. as the latter was a rebel against the Early Victorian lady of the languid waltz tunes and the album full of quotations from Byron: or as the last, again, was a rebel against a Puritan mother to whom the waltz was a wild orgy and Byron the Bolshevist of his age. Trace even the Puritan mother back through history and she represents a rebellion against the Cavalier laxity of the English Church, which was at first a rebel against the Catholic civilisation, which had been a rebel against the Pagan civilisation. Nobody but a lunatic could pretend that these things were a progress; for they obviously go first one way and then the other. But whichever is right, one thing is certainly wrong; and that is the modern habit of looking at them only from the modern end. For that is only to see the end of the tale; they rebel against they know not what, because it arose they know not when; intent only on its ending, they are ignorant of its beginning; and therefore of its very being. The difference between the smaller cases and the larger, is that in the latter there is really so huge a human upheaval that men start from it like men in a new world; and that very novelty enables them to go on very long; and generally to go on too long. It is because these things start with a vigorous revolt that the intellectual impetus lasts long enough to make them seem like a survival. An excellent example of this is the real story of the revival and the neglect of Aristotle. By the end of the medieval time, Aristotelianism did eventually grow stale. Only a very fresh and successful novelty ever gets quite so stale as that.

When the moderns, drawing the blackest curtain of obscurantism that ever obscured history, decided that nothing mattered much before the Renaissance and the Reformation, they instantly began their modern career by falling into a big blunder. It was the blunder about Platonism. They found, hanging about the courts of the swaggering princes of the sixteenth century (which was as far back in history as they were allowed to go) certain anti-clerical artists and scholars who said they were bored with Aristotle and were supposed to be secretly indulging in Plato. The moderns, utterly ignorant of the whole story of the medievals, instantly fell into the trap. They assumed that Aristotle was some crabbed antiquity and tyranny from the black back of the Dark Ages. and that Plato was an entirely new Pagan pleasure never yet tasted by Christian men. Father Knox has shown in what a startling state of innocence is the mind of Mr. H. L. Mencken, for instance, upon this point. In fact, of course. the story is exactly the other way round. If anything, it was Platonism that was the old orthodoxy. It was Aristotelianism that was the very modern revolution. And the leader of that modern revolution was the man who is the subject of this book.

The truth is that the historical Catholic Church began by being Platonist; by being rather too Platonist. Platonism was in that golden Greek air that was breathed by the first great Greek theologians. The Christian Fathers were much more like the NeoPlatonists than were the scholars of the Renaissance; who were only Neo-Neo-Platonists. For Chrysostom or Basil it was as ordinary and normal to think in terms of the Logos, or the Wisdom which is the aim of philosophers, as it is to any men of any religion today to talk about social problems or progress or the economic crisis throughout the world. St. Augustine followed a natural mental evolution when he was a Platonist before he was a Manichean, and a Manichean before he was a Christian. And it was exactly in that last association that the first faint hint, of the danger of being too Platonist, may be seen.

From the Renaissance to the nineteenth century, the Moderns have had an almost monstrous love of the Ancients. In considering medieval life, they could never regard the Christians as anything but the pupils of the Pagans; of Plato in ideas, or Aristotle in reason and science. It was not so. On some points, even from the most monotonously modern standpoint, Catholicism was centuries ahead of Platonism or Aristotelianism. We can see it still, for instance, in the tiresome tenacity of Astrology. On that matter the philosophers were all in favour of superstition; and the saints and all such superstitious people were against superstition. But even the great saints found it difficult to get disentangled from this superstition. Two points were always put by those suspicious of the Aristotelianism of Aquinas; and they sound to us now very quaint and comic, taken together. One was the view that the stars are personal beings, governing our lives: the other the great general theory that men have one mind between them; a view obviously opposed to immortality; that is, to individuality. Both linger among the Moderns: so strong is still the tyranny of the Ancients. Astrology sprawls over the Sunday papers, and the other doctrine has its hundredth form in what is called Communism: or the Soul of the Hive.

For on one preliminary point, this position must not be misunderstood. When we praise the practical value of the Aristotelian Revolution, and the originality of Aquinas in leading it, we do not mean that the Scholastic philosophers before him had not been philosophers, or had not been highly philosophical, or had not been in touch with ancient philosophy. In so far as there was ever a bad break in philosophical history, it was not before St. Thomas, or at the beginning of medieval history; it was after St. Thomas and at the beginning of modern history. The great intellectual tradition that comes down to us from Pythagoras and Plato was never interrupted or lost through such trifles as the sack of Rome, the triumph of Attila or all the barbarian invasions of the Dark Ages. It was only lost after the introduction of printing, the discovery of America, the founding of the Royal Society and all the enlightenment of the Renaissance and the modern world. It was there, if anywhere, that there was lost or impatiently snapped the long thin delicate thread that had descended from distant antiquity; the thread of that unusual human hobby; the habit of thinking. This is proved by the fact that the printed books of this later period largely had to wait for the eighteenth century, or the end of the seventeenth century, to find even the names of the new philosophers; who were at the best a new kind of philosophers. But the decline of the Empire, the Dark Ages and the early Middle Ages, though too much tempted to neglect what was opposed to Platonic philosophy, had never neglected philosophy. In that sense St. Thomas, like most other very original men, has a long and clear pedigree. He himself is constantly referring back to the authorities from St. Augustine to St. Anselm, and from St. Anselm to St. Albert, and even when he differs, he also defers.

A very learned Anglican once said to me, not perhaps without a touch of tartness, "I can't understand why everybody talks as if Thomas Aquinas were the beginning of the Scholastic philosophy. I could understand their saying he was the end of it." Whether or no the comment was meant to be tart, we may be sure that the reply of St. Thomas would have been perfectly urbane. And indeed it would be easy to answer with a certain placidity, that in his Thomist language the end of a thing does not mean its destruction, but its fulfilment. No Thomist will complain, if Thomism is the end of our philosophy, in the sense in which God is the end of our existence. For that does not mean that we cease to exist, but that we become as perennial as the philosophia perennis. Putting this claim on one side, however, it is important to remember that my distinguished interlocutor was perfectly right, in that there had been whole dynasties of doctrinal philosophers before Aquinas, leading up to the day of the great revolt of the Aristotelians. Nor was even that revolt a thing entirely abrupt and unforeseen. An able writer in the Dublin Review not long ago pointed out that in some respects the whole nature of metaphysics had advanced a long way since Aristotle, by the time it came to Aquinas. And that it is no disrespect to the primitive and gigantic genius of the Stagirite to say that in some respects he was really but a rude and rough founder of philosophy, compared with some of the subsequent subtleties of medievalism; that the Greek gave a few grand hints which the Scholastics developed into the most delicate fine shades. This may be an overstatement, but there is a truth in it. Anyhow, it is certain that even in Aristotelian philosophy, let alone Platonic philosophy, there was already a tradition of highly intelligent interpretation. If that delicacy afterwards degenerated into hair-splitting, it was none the less delicate hairsplitting; and work requiring very scientific tools.

What made the Aristotelian Revolution really revolutionary was the fact that it was really religious. It is the fact, so fundamental that I thought it well to lay it down in the first few pages of this book; that the revolt was largely a revolt of the most Christian elements in Christendom. St. Thomas, every bit as much as St. Francis, felt subconsciously that the hold of his people was slipping on the solid Catholic doctrine and discipline, worn smooth by more than a thousand years of routine; and that the Faith needed to be shown under a new light and dealt with from another angle. But he had no motive except the desire to make it popular for the salvation of the people. It was true, broadly speaking, that for some time past it had been too Platonist to be popular. It needed something like the shrewd and homely touch of Aristotle to turn it again into a religion of common sense. Both the motive and the method are illustrated in the war of Aquinas against the Augustinians.

First, it must be remembered that the Greek influence continued to flow from the Greek Empire; or at least from the centre of the Roman Empire which was in the Greek city of Byzantium, and no longer in Rome. That influence was Byzantine in every good and bad sense; like Byzantine art, it was severe and mathematical and a little terrible; like Byzantine etiquette, it was Oriental and faintly decadent. We owe to the learning of Mr. Christopher Dawson much enlightenment upon the way in which Byzantium slowly stiffened into a sort of Asiatic theocracy, more like that which served the Sacred Emperor in China. But even the unlearned can see the difference, in the way in which Eastern Christianity flattened everything, as it flattened the faces of the images into icons. It became a thing of patterns rather than pictures; and it made definite and destructive war upon statues. Thus we see, strangely enough, that the East was the land of the Cross and the West was the land of the Crucifix. The Greeks were being dehumanised by a radiant symbol, while the Goths were being humanised by an instrument of torture. Only the West made realistic pictures of the greatest of all the tales out of the East. Hence the Greek element in Christian theology tended more and more to be a sort of dried up Platonism; a thing of diagrams and abstractions; to the last indeed noble abstractions, but not sufficiently touched by that great thing that is by definition almost the opposite of abstraction: Incarnation. Their Logos was the Word; but not the Word made Flesh. In a thousand very subtle ways, often escaping doctrinal definition, this spirit spread over the world of Christendom from the place where the Sacred Emperor sat under his golden mosaics; and the flat pavement of the Roman Empire was at last a sort of smooth pathway for Mahomet. For Islam was the ultimate fulfilment of the Iconoclasts. Long before that, however, there was this tendency to make the Cross merely decorative like the Crescent; to make it a pattern like the Greek key or the Wheel of Buddha. But there is something passive about such a world of patterns, and the Greek Key does not open any door, while the Wheel of Buddha always moves round and never moves on.

Partly through these negative influences, partly through a necessary and noble asceticism which sought to emulate the awful standard of the martyrs, the earlier Christian ages had been excessively anti-corporeal and too near the danger-line of Manichean mysticism. But there was far less danger in the fact that the saints macerated the body than in the fact that the sages neglected it. Granted all the grandeur of Augustine's contribution to Christianity, there was in a sense a more subtle danger in Augustine the Platonist than even in Augustine the Manichee. There came from it a mood which unconsciously committed the heresy of dividing the substance of the Trinity. It thought of God too exclusively as a Spirit who purifies or a Saviour who redeems; and too little as a Creator who creates. That is why men like Aquinas thought it right to correct Plato by an appeal to Aristotle; Aristotle who took things as he found them, just as Aquinas accepted things as God created them. In all the work of St. Thomas the world of positive creation is perpetually present. Humanly speaking, it was he who saved the human element in Christian theology, if he used for convenience certain elements in heathen philosophy. Only, as has already been urged, the human element is also the Christian one.

The panic upon the Aristotelian peril, that had passed across the high places of the Church, was probably a dry wind from the desert. It was really filled rather with fear of Mahomet than fear of Aristotle. And this was ironic, because there was really much more difficulty in reconciling Aristotle with Mahomet than in reconciling him with Christ. Islam is essentially a simple creed for simple men; and nobody can ever really turn pantheism into a simple creed. It is at once too abstract and too complicated. There are simple believers in a personal God; and there are atheists more simple-minded than any believers in a personal God. But few can, in mere simplicity, accept a godless universe as a god. And while the Moslem, as compared with the Christian, had perhaps a less human God, he had if possible a more personal God. The will of Allah was very much of a will, and could not be turned into a stream of tendency. On all that cosmic and abstract side the Catholic was more accommodating than the Moslem--up to a point. The Catholic could admit at least that Aristotle was right about the impersonal elements of a personal God. Hence, we may say broadly of the Moslem philosophers, that those who became good philosophers became bad Moslems. It is not altogether unnatural that many bishops and doctors feared that the Thomists might become good philosophers and bad Christians. But there were also many, of the strict school of Plato and Augustine, who stoutly denied that they were even good philosophers. Between those rather incongruous passions, the love of Plato and the fear of Mahomet, there was a moment when the prospects of any Aristotelian culture in Christendom looked very dark indeed. Anathema after anathema was thundered from high places; and under the shadow of the persecution, as so often happens, it seemed for a moment that barely one or two figures stood alone in the storm-swept area. They were both in the black and white of the Dominicans; for Albertus and Aquinas stood firm.

In that sort of combat there is always confusion; and majorities change into minorities and back again, as if by magic. It is always difficult to date the turn of the tide, which seems to be a welter of eddies; the very dates seeming to overlap and confuse the crisis. But the change, from the moment when the two Dominicans stood alone to the moment when the whole Church at last wheeled into line with them, may perhaps be found at about the moment when they were practically brought before a hostile but a not unjust judge. Stephen Tempier, the Bishop of Paris, was apparently a rather fine specimen of the old fanatical Churchman, who thought that admiring Aristotle was a weakness likely to be followed by adoring Apollo. He was also, by a piece of bad luck, one of the old social conservatives, who had intensely resented the popular revolution of the Preaching Friars. But he was an honest man; and Thomas Aquinas never asked for anything but permission to address honest men. All around him there were other Aristotelian revolutionaries of a much more dubious sort. There was Siger, the sophist from Brabant, who learned all his Aristotelianism from the Arabs; and had an ingenious theory about how an Arabian agnostic could also be a Christian. There were a thousand young men of the sort that had shouted for Abelard; full of the youth of the thirteenth century and drunken with the Greek wine of Stagira. Over against them, lowering and implacable, was the old Puritan party of the Augustinians; only too delighted to class the rationalistic Albert and Thomas with equivocal Moslem meta-physicians.

It would seem that the triumph of Thomas was really a personal triumph. He withdrew not a single one of his propositions; though it is said that the reactionary Bishop did condemn some of them after his death. On the whole, however, Aquinas convinced most of his critics that he was quite as good a Catholic as they were. There was a sequel of squabbles between the Religious Orders, following upon this controversial crisis. But it is probably true to say that the fact, that a man like Aquinas had managed even partially to satisfy a man like Tempier, was the end of the essential quarrel. What was already familiar to the few became familiar to the many; that an Aristotelian could really be a Christian. Another fact assisted in the common conversion. It rather curiously resembles the story of the translation of the Bible; and the alleged Catholic suppression of the Bible. Behind the scenes, where the Pope was much more tolerant than the Paris Bishop, the friends of Aquinas had been hard at work producing a new translation of Aristotle. It demonstrated that in many ways the heretical translation had been a very heretical translation. With the final consummation of this work, we may say that the great Greek philosophy entered finally into the system of Christendom. The process has been half humourously described as the Baptism of Aristotle.

We have all heard of the humility of the man of science; of many who were very genuinely humble; and of some who were very proud of their humility. It will be the somewhat too recurrent burden of this brief study that Thomas Aquinas really did have the humility of the man of science; as a special variant of the humility of the saint. It is true that he did not himself contribute anything concrete in the experiment or detail of physical science; in this, it may be said, he even lagged behind the last generation, and was far less of an experimental scientist than his tutor Albertus Magnus. But for all that, he was historically a great friend to the freedom of science. The principles he laid down, properly understood, are perhaps the best that can be produced for protecting science from mere obscurantist persecution. For instance, in the matter of the inspiration of Scripture, he fixed first on the obvious fact, which was forgotten by four furious centuries of sectarian battle, that the meaning of Scripture is very far from self-evident and that we must often interpret it in the light of other truths. If a literal interpretation is really and flatly contradicted by an obvious fact, why then we can only say that the literal interpretation must be a false interpretation. But the fact must really be an obvious fact. And unfortunately, nineteenth century scientists were just as ready to jump to the conclusion that any guess about nature was an obvious fact, as were seventeenth-century sectarians to jump to the conclusion that any guess about Scripture was the obvious explanation. Thus, private theories about what the Bible ought to mean, and premature theories about what the world ought to mean, have met in loud and widely advertised controversy, especially in the Victorian time; and this clumsy collision of two very impatient forms of ignorance was known as the quarrel of Science and Religion.

But St. Thomas had the scientific humility in this very vivid and special sense; that he was ready to take the lowest place; for the examination of the lowest things. He did not, like a modern specialist, study the worm as if it were the world; but he was willing to begin to study the reality of the world in the reality of the worm. His Aristotelianism simply meant that the study of the humblest fact will lead to the study of the highest truth. That for him the process was logical and not biological, was concerned with philosophy rather than science, does not alter the essential idea that he believed in beginning at the bottom of the ladder. But he also gave, by his view of Scripture and Science, and other questions, a sort of charter for pioneers more purely practical than himself. He practically said that if they could really prove their practical discoveries, the traditional interpretation of Scripture must give way before those discoveries. He could hardly, as the common phrase goes, say fairer than that. If the matter had been left to him, and men like him, there never would have been any quarrel between Science and Religion. He did his very best to map out two provinces for them, and to trace a just frontier between them.

It is often cheerfully remarked that Christianity has failed, by which is meant that it has never had that sweeping, imperial and imposed supremacy, which has belonged to each of the great revolutions, every one of which has subsequently failed. There was never a moment when men could say that every man was a Christian; as they might say for several months that every man was a Royalist or a Republican or a Communist. But if sane historians want to understand the sense in which the Christian character has succeeded, they could not find a better case than the massive moral pressure of a man like St. Thomas, in support of the buried rationalism of the heathens, which had as yet only been dug up for the amusement of the heretics. It was, quite strictly and exactly, because a new kind of man was conducting rational enquiry in a new kind of way, that men forgot the curse that had fallen on the temples of the dead demons and the palaces of the dead despots; forgot even the new fury out of Arabia against which they were fighting for their lives; because the man who was asking them to return to sense, or to return to their senses, was not a sophist but a saint. Aristotle had described the magnanimous man, who is great and knows that he is great. But Aristotle would never have recovered his own greatness, but for the miracle that created the more magnanimous man; who is great and knows that he is small.

There is a certain historical importance in what some would call the heaviness of the style employed. It carries a curious impression of candour, which really did have, I think, a considerable effect upon contemporaries. The saint has sometimes been called a sceptic. The truth is that he was very largely tolerated as a sceptic because he was obviously a saint. When he seemed to stand up as a stubborn Aristotelian, hardly distinguishable from the Arabian heretics, I do seriously believe that what protected him was very largely the prodigious power of his simplicity and his obvious goodness and love of truth. Those who went out against the haughty confidence of the heretics were stopped and brought up all standing, against a sort of huge humility which was like a mountain: or perhaps like that immense valley that is the mould of a mountain. Allowing for all medieval conventions, we can feel that with the other innovators, this was not always so. The others, from Abelard down to Siger of Brabant, have never quite lost, in the long process of history, a faint air of showing off. Nobody could feel for a moment that Thomas Aquinas was showing off. The very dullness of diction, of which some complain, was enormously convincing. He could have given wit as well as wisdom; but he was so prodigiously in earnest that he gave his wisdom without his wit.

After the hour of triumph came the moment of peril. It is always so with alliances, and especially because Aquinas was fighting on two fronts. His main business was to defend the Faith against the abuse of Aristotle; and he boldly did it by supporting the use of Aristotle. He knew perfectly well that armies of atheists and anarchists were roaring applause in the background at his Aristotelian victory over all he held most dear. Nevertheless, it was never the existence of atheists, any more than Arabs or Aristotelian pagans, that disturbed the extraordinary controversial composure of Thomas Aquinas. The real peril that followed on the victory he had won for Aristotle was vividly presented in the curious case of Siger of Brabant; and it is well worth study, for anyone who would begin to comprehend the strange history of Christendom. It is marked by one rather queer quality; which has always been the unique note of the Faith, though it is not noticed by its modern enemies, and rarely by its modern friends. It is the fact symbolised in the legend of Antichrist, who was the double of Christ; in the profound proverb that the Devil is the ape of God. It is the fact that falsehood is never so false as when it is very nearly true. It is when the stab comes near the nerve of truth, that the Christian conscience cries out in pain. And Siger of Brabant, following on some of the Arabian Aristotelians, advanced a theory which most modern newspaper readers would instantly have declared to be the same as the theory of St. Thomas. That was what finally roused St. Thomas to his last and most emphatic protest. He had won his battle for a wider scope of philosophy and science; he had cleared the ground for a general understanding about faith and enquiry; an understanding that has generally been observed among Catholics, and certainly never deserted without disaster. It was the idea that the scientist should go on exploring and experimenting freely, so long as he did not claim an infallibility and finality which it was against his own principles to claim. Meanwhile the Church should go on developing and defining, about supernatural things, so long as she did not claim a right to alter the deposit of faith, which it was against her own principles to claim. And when he had said this, Siger of Brabant got up and said something so horribly like it, and so horribly unlike, that (like the Antichrist) he might have deceived the very elect.

Siger of Brabant said this: the Church must be right theologically, but she can be wrong scientifically. There are two truths; the truth of the supernatural world, and the truth of the natural world, which contradicts the supernatural world. While we are being naturalists, we can suppose that Christianity is all nonsense; but then, when we remember that we are Christians, we must admit that Christianity is true even if it is nonsense. In other words, Siger of Brabant split the human head in two, like the blow in an old legend of battle; and declared that a man has two minds, with one of which he must entirely believe and with the other may utterly disbelieve. To many this would at least seem like a parody of Thomism. As a fact, it was the assassination of Thomism. It was not two ways of finding the same truth; it was an untruthful way of pretending that there are two truths. And it is extraordinarily interesting to note that this is the one occasion when the Dumb Ox really came out like a wild bull. When he stood up to answer Siger of Brabant, he was altogether transfigured, and the very style of his sentences, which is a thing like the tone of a man's voice, is suddenly altered. He had never been angry with any of the enemies who disagreed with him. But these enemies had attempted the worst treachery: they had made him agree with them.

Those who complain that theologians draw fine distinctions could hardly find a better example of their own folly. In fact, a fine distinction can be a flat contradiction. It was notably so in this case. St. Thomas was willing to allow the one truth to be approached by two paths, precisely because he was sure there was only one truth. Because the Faith was the one truth, nothing discovered in nature could ultimately contradict the Faith. Because the Faith was the one truth, nothing really deduced from the Faith could ultimately contradict the facts. It was in truth a curiously daring confidence in the reality of his religion: and though some may linger to dispute it, it been justified. The scientific facts, which were supposed to contradict the Faith in the nineteenth century, are nearly all of them regarded as unscientific fictions in the twentieth century. Even the materialists have fled from materialism; and those who lectured us about determinism in psychology are already talking about indeterminism in matter. But whether his confidence was right or wrong, it was specially and supremely a confidence that there is one truth which cannot contradict itself. And this last group of enemies suddenly sprang up, to tell him they entirely agreed with him in saving that there are two contradictory truths. Truth, in the medieval phrase, carried two faces under one hood; and these double-faced sophists practically dared to suggest that it was the Dominican hood.

So, in his last battle and for the first time, he fought as with a battle-axe. There is a ring in the words altogether beyond the almost impersonal patience he maintained in debate with so many enemies. "Behold our refutation of the error. It is not based on documents of faith, but on the reasons and statements of the philosophers themselves. If then anyone there be who, boastfully taking pride in his supposed wisdom, wishes to challenge what we have written, let him not do it in some corner nor before children who are powerless to decide on such difficult matters. Let him reply openly if he dare. He shall find me then confronting him, and not only my negligible self, but many another whose study is truth. We shall do battle with his errors or bring a cure to his ignorance."

The Dumb Ox is bellowing now; like one at bay and yet terrible and towering over all the baying pack. We have already noted why, in this one quarrel with Siger of Brabant, Thomas Aquinas let loose such thunders of purely moral passion; it was because the whole work of his life was being betrayed behind his back, by those who had used his victories over the reactionaries. The point at the moment is that this is perhaps his one moment of personal passion, save for a single flash in the troubles of his youth: and he is once more fighting his enemies with a firebrand. And yet, even in this isolated apocalypse of anger, there is one phrase that may be commended for all time to men who are angry with much less cause. If there is one sentence that could be carved in marble, as representing the calmest and most enduring rationality of his unique intelligence, it is a sentence which came pouring out with all the rest of this molten lava. If there is one phrase that stands before history as typical of Thomas Aquinas, it is that phrase about his own argument: "It is not based on documents of faith, but on the reasons and statements of the philosophers themselves." Would that all Orthodox doctors in deliberation were as reasonable as Aquinas in anger! Would that all Christian apologists would remember that maxim; and write it up in large letters on the wall, before they nail any theses there. At the top of his fury, Thomas Aquinas understands, what so many defenders of orthodoxy will not understand. It is no good to tell an atheist that he is an atheist; or to charge a denier of immortality with the infamy of denying it; or to imagine that one can force an opponent to admit he is wrong, by proving that he is wrong on somebody else's principles, but not on his own. After the great example of St. Thomas, the principle stands, or ought always to have stood established; that we must either not argue with a man at all, or we must argue on his grounds and not ours. We may do other things instead of arguing, according to our views of what actions are morally permissible; but if we argue we must argue "On the reasons and statements of the philosophers themselves." This is the common sense in a saying attributed to a friend of St. Thomas, the great St. Louis, King of France, which shallow people quote as a sample of fanaticism; the sense of which is, that I must either argue with an infidel as a real philosopher can argue, or else "thrust a sword through his body as far as it will go." A real philosopher (even of the opposite school) will be the first to agree that St. Louis was entirely philosophical.

So, in the last great controversial crisis of his theological campaign, Thomas Aquinas contrived to give his friends and enemies not only a lesson in theology, but a lesson in controversy. But it was in fact his last controversy. He had been a man with a huge controversial appetite, a thing that exists in some men and not others, in saints and in sinners. But after this great and victorious duel with Siger of Brabant, he was suddenly overwhelmed with a desire for silence and repose. He said one strange thing about this mood of his to a friend, which will fall into its more appropriate place elsewhere. He fell back on the extreme simplicities of his monastic round and seemed to desire nothing but a sort of permanent retreat. A request came to him from the Pope that he should set out upon some further mission of diplomacy or disputation; and he made ready to obey. But before he had gone many miles on the journey, he was dead.

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