30. Then Joshua built an altar, etc God had been pleased that this should be the first extraordinary sacrifice offered to him in the land of Canaan, that thus the people might attest their gratitude, and the land begin to be consecrated in regular form. It was not possible for the people to do it before freely and on their own soil, till they had obtained possession of some vacant region.¹ Now, God had at the same time given them two commands -- first, that they should erect an altar on Mount Ebal; and secondly, that they should set up two stones plastered over with lime, on which they should write the Law, in order that every passer by might be able to see it and read it. We now read that both were faithfully performed. A third command related to the recitation of blessings and cursings: this, too, Joshua performed with no less care.

To begin with the altar, -- it is said, that according to the divine command, it was formed of unhewn stones. For entire stones on which the masons' iron has not been employed, are called rough and unworked.² This is specially said in Deuteronomy 27, of the altar, of which mention is now made. But the same thing had before been said in general of all others. Some expounders, in searching for the reason, needlessly have recourse to allegory, and allege that the hand and industry of men are forbidden, because the moment we introduce any devices of our own, the worship of God is vitiated. This is indeed truly and wisely said, but it is out of place, as the divine intention simply was to prohibit the perpetuity of altars. For we know, that in order to sacrifice duly, it was enjoined that all should have one common altar, in order both to cherish mutual agreement, and to obviate all sources of corruption from the introduction of an adventitious superstition; in short, in order that religion might remain one and simple, as a variety of altars would soon have led to discord, thereby distracting the people and putting sincere piety to flight.

Then it was not left to the choice of the people to select a place, but God uniformly in the books of Moses claims this for himself. He therefore confines the exercises of piety to that place where he may have put the remembrance of his name. Moreover, as the divine will was not immediately manifested, nor the place designated, that worship might not in the mean time cease, it was permitted to build an altar where the ark should happen to be stationed, but an altar formed only of a rude pile of stones, or of turf, that it might be only temporary.

Let the reader observe that an option was given to the people to make it of rough stones, that its form might not attract veneration, or of earth, which would crumble away of its own accord. In one word, this arrangement tended to give a pre-eminence to the perpetual altar, after God made choice of Mount Zion for its locality. Hence it is said in the Psalm, I was glad because our feet will stand in thy courts, O Jerusalem! (Psalm 122:1, 2) What other translators render peace offerings, I have, not without cause, rendered by sacrifices of prosperity, because they were offered up either to solicit successful results, or to render thanks; and the Hebrew term is not unsuitable, as the reader will find more fully explained in my commentaries on the books of Moses.

32. And he wrote there upon the stones, etc A different rule is applicable to the stones here mentioned, on which God wished that a memorial of his Law should always appear, in order that, a kind of barrier might be interposed to protect the pure religion against the superstitions of Egypt. They were therefore covered with lime, that they might be more conspicuous, and the writing upon them more distinct. I willingly subscribe to the opinion of those who understand by the repeated Law a written form, or what is commonly called a copy or duplicate. I cannot, however, believe that the whole volume was traced upon it; for no stones however large could suffice to contain all the details. I therefore think that by the term Law only its substance and sanctions³ are denoted. This made it palpable even to strangers entering the land what God was worshipped in it, and all excuse for error was taken away, when the Law was not treasured up in a book, but made manifest to the eyes of all. In short, though the priests should have been dumb, the stones themselves spoke clearly.

33. And all Israel, and their elders, etc The third instance of obedience was the placing all the tribes on Mount Gerizim and Mount Ebal to stand in six rows each over against each other. For they were so arranged that six stood on Mount Ebal, and an equal number on the opposite Mount Gerizim. The intervening space was occupied by the Levites with the ark of the covenant, that the Lord might be surrounded on all sides by his own people. It is said that Joshua stood that he might first bless the people, as it was the purpose of God to allure the people to himself by sweetness and winning condescension. For although Moses, to rebuke the obstinacy of the people, makes mention of curses only, it is certain that these were in a manner accidental, because the genuine method was to employ blessings as a means of gaining over to obedience those who might otherwise have proved refractory. But when humane invitation proved unavailing, curses were added as a new resource and remedy.

God had promised ample rewards to his servants who should obey the Law. On the other hand, curses were denounced in order to deter transgressors. Each is now forced to subscribe his own condemnation, while an amen is responded to every single sentence. For in this way they not only hear themselves condemned by the mouth of God, but as if they had been heralds sent by him, they denounce the punishment which may await themselves. A similar promulgation was made in the plain of Moab beyond the Jordan, but now they are bound more solemnly, and acknowledge on what condition they are to dwell in the land of Canaan. It added no little weight to the whole, that the children also were admitted as witnesses.