Moses having gone into the thick darkness, where God was, God there spoke in his hearing only, privately and without terror, all that follows hence to the end of ch. 23, which is mostly an exposition of the ten commandments; and he was to transmit it by word of mouth first, and afterwards in writing, to the people. The laws in these verses related to God's worship.

I.They are here forbidden to make images for worship (Exo 20:22, Exo 20:23): You have seen that I have talked with you from heaven (such was his wonderful condescension, much more than for some mighty prince to talk familiarly with a company of poor beggars); now you shall not make gods of silver.

1.This repetition of the second commandment comes in here, either (1.) As pointing to that which God had chiefly in view in giving them this law in this manner, that is, their peculiar addictedness to idolatry, and the peculiar sinfulness of that crime. Ten commandments God had given them, but Moses is ordered to inculcate upon them especially the first two. They must not forget any of them, but they must be sure to remember those. Or, (2.) As pointing to that which might properly be inferred from God's speaking to them as he had done. He had given them sufficient demonstration of his presence among them; they needed not to make images of him, as if he were absent. Besides, they had only seen that he talked with them; they had seen no manner of similitude, so that they could not make any image of God; and his manifesting himself to them only by a voice plainly showed them that they must not make any such image, but keep up their communion with God by his word, and not otherwise.

2.Two arguments are here hinted against image-worship: - (1.) That thereby they would affront God, intimated in that, You shall not make with me gods. Though they pretended to worship them but as representations of God, yet really they made them rivals with God, which he would not endure. (2.) That thereby they would abuse themselves, intimated in that, "You shall not make unto you gods; while you think by them to assist your devotion, you will really corrupt it, and put a cheat upon yourselves." At first, it should seem, they made their images for worship of gold and silver, pretending, by the richness of those metals, to honour God, and, by the brightness of them, to affect themselves with his glory; but, even in these, they changed the truth of God into a lie, and so, by degrees, were justly given up to such strong delusions as to worship images of wood or stone.

II.They are here directed in making altars for worship: it is meant of occasional altars, such as they reared now in the wilderness, before the tabernacle was erected, and afterwards upon special emergencies, for present use, such as Gideon built (Jdg 6:24), Manoah (Jdg 13:19), Samuel (Sa1 7:17), and many others. We may suppose, now that the people of Israel were, with this glorious discovery which God had made of himself to them, that many of them would incline, in this pang of devotion, to offer sacrifice to God; and, it being necessary to a sacrifice that there be an alter, they are here appointed,

1.To make their altars very plain, either of earth or of unhewn stone, Exo 20:24, Exo 20:25. That they might not be tempted to think of a graven image, they must not so much as hew into shape the stones that they made their altars of, but pile them up as they were, in the rough. This rule being prescribed before the establishment of the ceremonial law, which appointed altars much more costly, intimates that, after the period of that law, plainness should be accepted as the best ornament of the external services of religion, and that gospel-worship should not be performed with external pomp and gaiety. The beauty of holiness needs no paint, nor do those do any service to the spouse of Christ that dress her in the attire of a harlot, as the church of Rome does: an altar of earth does best.

2.To make their altars very low (Exo 20:26), so that they might not go up by steps to them. That the higher the altar was, and the nearer heaven, the more acceptable the sacrifice was, was a foolish fancy of the heathen, who therefore chose high places; in opposition to this, and to show that it is the elevation of the heart, not of the sacrifice, that God looks at, they were here ordered to make their altars low. We may suppose that the altars they reared in the wilderness, and other occasional altars, were designed only for the sacrifice of one beast at a time; but the altar in Solomon's temple, which was to be made much longer and broader, that it might contain many sacrifices at once, was made ten cubits high, that the height might bear a decent proportion to the length and breadth; and to that it was requisite they should go up by steps, which yet, no doubt, were so contrived as to prevent the inconvenience here spoken of, the discovering of their nakedness thereon.

III.They are here assured of God's gracious acceptance of their devotions, wherever they were paid according to his will (Exo 20:24): In all places where I record my name, or where my name is recorded (that is, where I am worshipped in sincerity), I will come unto thee, and I will bless thee. Afterwards, God chose one particular place wherein to record his name: but that being taken away now under the gospel, when men are encouraged to pray every where, this promise revives in its full extent, that, wherever God's people meet in his name to worship him, he will be in the midst of them, he will honour them with his presence, and reward them with the gifts of his grace; there he will come unto them, and will bless them, and more than this we need not desire for the beautifying of our solemn assemblies.

Thou shalt not build it of hewn stone - Because they were now in a wandering state, and had as yet no fixed residence; and therefore no time should be wasted to rear costly altars, which could not be transported with them, and which they must soon leave. Besides, they must not lavish skill or expense on the construction of an altar; the altar of itself, whether costly or mean, was nothing in the worship; it was only the place on which the victim should be laid, and their mind must be attentively fixed on that God to whom the sacrifice was offered, and on the sacrifice itself, as that appointed by the Lord to make an atonement for their sins.

Neither shalt thou go up by steps unto mine altar,.... That is, you priests, the sons of Aaron, as the Targums of Jonathan and Jerusalem paraphrase the words; the altar of burnt offering built when the tabernacle was seemed not to require any, being but three cubits high, Exo 27:1 but that in Solomon's temple did, being ten cubits high, Ch2 4:1 and therefore some method must be used to ascend it, and do the business that was to be done on it: now the Jews say (b), there was what they call "Kibbesh", a sort of a causeway made of earth thrown up, which rose gradually and led to the top of the altar, and was about thirty two cubits long and sixteen broad: and so the Targum of Jonathan paraphrases the words,"thou shalt not go up by steps to mine altar, but by bridges;''express mention is made of stairs to the altar in Ezekiel's vision, Eze 43:17.

that thy nakedness be not discovered thereon; that part of the body which is not to be named, and ought not to be seen, and which would be exposed if there were many steps, and these at a distance from each other; which would oblige them to take large strides, and so be in danger of discovering those parts which would make them the object of contempt and ridicule with the people; since as yet breeches were not used, and the garments were long loose ones, which were easily turned aside, or the parts under them seen by those below; to prevent which, afterwards linen breeches were ordered to be made for the priests, and to be used by them in their service: Maimonides (c) thinks the reason of this was, because formerly the idolatrous worship of Peor was performed by uncovering of their nakedness before it; and so by this is expressed God's detestation of such an impure and abominable practice; but this is uncertain; however, this we may be sure of, that this is the will of God, that all immodesty and indecency, and whatever tends to create impure thoughts and stir up unclean lusts, should be carefully avoided in his worship.

(b) Middot, c. 3. sect. 3. (c) Ut supra. (Apud L'Empereur in Middot, ib.)

Next: Exodus Chapter 21

thou shalt not build it of hewn stone, &c.--that is, carved with figures and ornaments that might lead to superstition.