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15. Lo, I have made thee. The Prophet still speaks of the restoration of the Church, and promises that she will be so victorious over her enemies as to crush and reduce them to powder; and he declares this by a highly appropriate metaphor. The Jews, whom he addresses, were nearly crushed, but he declares that, on the contrary, they shall crush their enemies, so that, after having been delivered, they shall render to them what had been done to themselves. It was necessary that this should be added, for, if they had not regained new strength, they would always have been exposed to the unlawful passions of their enemies; and therefore they needed that God should give them strength to repel the attacks which were made upon them. Yet Isaiah at the same time declares that they shall be executioners of the vengeance of God.

But it may be thought that in this way he inflames the Jews to be desirous of taking revenge. Now, this is quite contrary to the nature of the Spirit of God; and, while we are too much inclined to this disease, the Lord is so far from treating with forbearance these purposes of revenge, that in many passages he commands us to repress them; for he exhorts us rather to pray for our enemies, and not to take delight in their distresses and afflictions. (Matthew 5:44.) I reply, the Prophet here shews what will happen, but neither commands nor exhorts us to desire the destruction of our enemies. If it be again objected that we ought not only to expect but even to desire what the Lord promises, when it tends to his glory and our salvation; I acknowledge that this consolation tends greatly to alleviate our sorrows, when he promises that he will one day inflict punishment on enemies who have cruelly distressed us, and will render to them the measure which they have meted out. (Matthew 7:2.) Yet this is not inconsistent with the command of God, that we should be kind-hearted, and should pity them on account of the evils which they bring upon themselves, and bewail their wretched condition, instead of being led by cruel dispositions to rejoice in their destruction. (Matthew 5:44.)

If we embrace this promise with that faith which we ought to cherish, we shall bring into subjection all the violence of the flesh, and consequently shall first be disposed to endure, and afterwards with moderate zeal shall desire the judgment of God. Accordingly, it ought to be our first aim to repress and lay aside every violent emotion of the flesh, and thus to await with an honest and sincere heart the fit season of the divine judgment; and that not so much from a regard to our private advantage as that due praise may be given to the justice of God. To the same purpose David wrote —

“The righteous shall rejoice when they shall see the vengeance; they shall wash their feet in the blood of wicked men.”
(Psalm 58:10.)

Not that they delight in their distresses, but because, as he afterwards adds, the righteous man receives his reward, and the righteous judgments of God are made known in the earth when the wicked are punished for their transgressions.

The Jews, being by nature cruel and eager of bloodshed, seize on these promises after the manner of wild and savage beasts, which eagerly devour the prey that is offered to them, and, as soon as they smell it, are mad with rage. But the Lord does not wish his people to forget that kindness which he recommends above all things; for we cannot be his, if we are not guided by the same spirit, that is, by the spirit of mildness and gentleness. In a word, by this metaphor of “a harrow having teeth,” he means nothing else than the wretched destruction of the wicked, whom the Lord will put to flight by the hand of the godly; and that for the purpose of comforting the godly, and not of inflaming them with eagerness for shedding blood.

16. Thou shalt winnow them. The meaning is the same as in the former verse, but by a different metaphor; for he compares the Church to a sieve, and wicked men to the chaff which is driven away by the sieve and scattered in every direction. As if he had said, “Though for a time the Gentiles bruise and winnow you, yet a severer judgment awaits them; for by their destruction they shall be bruised and driven away like chaff.” But we ought to observe the difference, because here believers are bruised for their good, for they suffer themselves to be subdued and placed under the authority of God; while others, who obstinately resist and do not suffer themselves to be brought into subjection, are scattered by the wind like chaff or stubble, as the Prophet tells us. Thus God had struck them with his flails, had bruised and trodden them, had winnowed and tossed them about, in order that, when the wheat had been well cleansed, he might gather them to himself; but the heathen nations he assigns as chaff to the dunghill.

To this is added, that the victorious Church bruises some unbelievers, so that, being purified from their pollution, they obtain a place in God’s barn; and thus was this prediction fulfilled, whenever by the agency of believers some of the Gentiles were subdued, so as to yield obedience to the authority of Christ; for they were never invested with any earthly power, so as to rule over all his enemies, but on the contrary they found it necessary to “possess their souls in patience.” (Luke 21:19.) But the Lord raised them up like palm-trees bent down by so many burdens, so that they not only were safe and sound, but also, with unshaken firmness of mind, trod their enemies under their feet.

It ought also to be observed, that Scripture is frequently accustomed to apply to the Church what strictly belongs to God alone. Since, therefore, God afflicted the ungodly Gentiles for the sake of his Church, he is said to have given them to be trodden under the feet of believers, who reaped the advantage. Whenever we read those prophecies, our minds ought to be raised to the kingdom of Christ, that, free from every wicked disposition, we may observe becoming moderation, and may not desire that this bruising should take place before the proper time; for it ought to be abundantly sufficient for us, if our Head shall at length prostrate his enemies under his feet, that we may share in the triumph of his victory.

But thou shalt rejoice in Jehovah. When he adds that the Jews will have cause to rejoice in the Lord, though by this confidence he intends to alleviate their grief, yet at the same time he admonishes the godly to be modest, that they may not exult with fierceness of mind, if at any time it happen that they are raised up by the hand of God, and exalted in such a manner as to reduce their enemies under their power; for there is nothing to which men are more prone than to become proud and insolent when everything happens to their wish. They forget that they are men, and blot out the remembrance of God, whom they ought to have acknowledged as the author of all blessings. In order, therefore, to restrain that immoderate exultation in which the flesh always indulges, and by which we often suffer ourselves to be carried away, the Prophet adds, “in the Lord,” because on him all our glory and all our joy ought to rest. In a word, the Prophet exhorts to gratitude, that, the more highly God exalts us, the more carefully ought we to repress all the vanity of ambition, and rejoice and glory in him alone.

17. The needy and poor shall seek water. Here he follows out the subject which he had begun to handle at the beginning of the fortieth chapter; for he describes the wretched and afflicted condition in which the Jews should be in Babylon, till at length God should have compassion on them and render assistance. He therefore prepares them for enduring extreme poverty, by saying that they will be thirsty; for this figure of speech, by which a part is taken for the whole, is better adapted to express the severity of the affliction. We know that nothing gives men greater distress than the want of water when they are “thirsty.”

I Jehovah will listen to them. God declares that he will relieve them, when they are brought to this necessitous condition; and hence we ought to learn to whom this promise belongs, namely, to those who, having been reduced to extremity, are as it were, parched with thirst and almost fainting. Hence also we see that the Church does not always possess an abundance of all blessings, but sometimes feels the pressure of great poverty, that she may be driven by these spurs to call upon God; for we commonly fall into slothfulness, when everything moves on according to our wish. It is therefore advantageous to us to thirst and hunger, that we may learn to flee to the Lord with our whole heart. In a word, we need to be deeply affected with a conviction of our poverty, that we may feel the Lord’s assistance. The Prophet unquestionably intended, by this circumstance, partly to illustrate the greatness of the favor, and partly to advise the people not to lose heart on account of their poverty.

The needy and poor. We ought to observe the names by which the Prophet here denominates the people of God. When he calls them “afflicted and poor,” he does not speak of strangers, but of those whom the Lord had adopted and chosen to be his heritage, and whom he forewarns that they must patiently endure some severe hardships. Hence we ought not to wonder if the Lord sometimes permit us almost to languish through hunger and thirst, since he dealt not less severely with our fathers.

When he says that waters are nowhere to be seen, let us learn that the Lord, in order to try our patience and faith, withdraws from us every assistance, that we may lean on him alone. Thus, when we look around on every side, and see no relief, let us know that still the Lord will assist. By the expression, I will listen, he means that God does not assist every kind of persons, but those who pray to him; for if we are so slothful as to disregard his aid, it is right that we should be altogether deprived of it, and, on account of our unworthiness, should feel no alleviation.

18. and 19. I will open rivers. He illustrates the former doctrine in a different manner, namely, that God has no need of outward and natural means for aiding his Church, but has at his command secret, and wonderful methods, by which he can relieve their necessities, contrary to all hope and outward appearance. When no means of relief are seen, we quickly fall into despair, and scarcely venture to entertain any hope, but so far as outward aids are presented to our eyes. Deprived of these, we cannot rest on the Lord. But the Prophet states that at that time especially they ought to trust, because at that time the Lord has more abundant opportunities of displaying his power, when men perceive no ways or methods, and everything appears to be utterly desperate. Contrary, then, to the hope and belief of all men, the Lord will assist his people, that we may not suffer ourselves to be driven hither and thither by doubt and hesitation.

On lofty mountain tops. In order to confirm his statement more fully, he promises that he will perform miracles contrary to the nature and order of things, that we may not imagine that we should think and judge of these things according to human capacity, or limit the power and promises of God to these inferior means. ¹⁴³¹⁴³     “Aux causes secondes.” “To second causes.” The Lord has sufficient power in himself, and needs not to borrow from any other, and is not confined to the order of nature, which he can easily change, whenever he thinks fit; for when he says that he will make waters to flow on the tops of mountains, and fountains in valleys, and pools in deserts, we know that all this is contrary to the order of nature. The reason why he promised these things is abundantly evident. It was that the Jews might not think that they were prevented from returning to Judea by that vast desert in which travelers are scorched by the heat of the sun, and deprived of all the necessaries of life. The Lord therefore promises that he will supply them with water, and with everything else that is necessary for the journey. Now, these things were fulfilled when the Lord brought his people out of Babylon, but much more abundantly when he converted the whole world to himself by Christ the Redeemer, from whom flow in great abundance throughout the whole world waters to quench the thirst of poor sinners. ¹⁴⁴¹⁴⁴     “Des poures pecheurs.” At that time such a change took place as could never have entered into the imaginations of men.

20. Therefore let them see and know. While God leads us by all his works to adore him, yet when the restoration of his Church is the matter in question, his wonderful power is manifested, so as to constrain all to admire him. As we have seen elsewhere, and as he will afterwards repeat frequently, when he brought back his people from banishment, he gave a proof fitted for being remembered in all ages, as he declares in this passage that he will do. But because we are either sluggish or careless in considering his works, and because they quickly pass away from our view in consequence of our giving so little attention to them, he repeats the same statement in many forms. We give our attention to vain and useless matters, instead of admiring these works of God; and if at any time they excite our admiration, yet we quickly forget them, because we are speedily led aside to different and very unimportant matters. The Prophet therefore arouses us, in order to shake off our slothfulness, and to quicken and direct all our senses to understand the power of God. On this account he places in the first rank looking, which produces certain knowledge, and next adds thought, which more fully and abundantly confirms the knowledge.

It is uncertain whether the Prophet speaks of the Jews, who were the citizens of the Church, or of foreigners; but in my opinion we may view it as having a general meaning, that in the restoration of the Church the hand of God will be visible even to very remote Gentiles, so that all shall be constrained to admire the work of God. Yet it is certain that the Persians and Medes, after having conquered the Jews, were singularly astonished when they heard those passages from the prophets, and especially when they beheld the accomplishment of them before their eyes; for they knew that such things could not be performed by men, though they were not converted to God.