Exodus 20:2

The Ten Words commenced with a declaration of Jehovah concerning Himself, which served as a practical basis for the obligation on the part of the people to keep the commandments: "I am Jehovah thy God, who brought thee," etc. By bringing them out of Egypt, the house of bondage, Jehovah had proved to the Israelites that He was their God. This glorious act, to which Israel owed its existence as an independent nation, was peculiarly fitted, as a distinct and practical manifestation of unmerited divine love, to kindle in the hearts of the people the warmest love in return, and to incite them to keep the commandments. These words are not to be regarded, as Knobel supposes, as either a confession, or the foundation of the whole of the theocratical law, just as Saleucus, Plato, and other lawgivers placed a belief in the existence of the gods at the head of their laws. They were rather the preamble, as Calvin says, by which God prepared the minds of the people for obeying them, and in this sense they were frequently repeated to give emphasis to other laws, sometimes in full, as in Exo 29:46; Lev 19:36; Lev 23:43; Lev 25:38, Lev 25:55; Lev 26:13, etc., sometimes in the abridged form, "I am Jehovah your God," as in Lev 11:44; Lev 18:2, Lev 18:4, Lev 18:30; Lev 19:4, Lev 19:10, Lev 19:25, Lev 19:31, Lev 19:34; Lev 20:7, etc., for which the simple expression, "I am Jehovah," is now and then substituted, as in Lev 19:12-13, Lev 19:16, Lev 19:18, etc.

All things being prepared for the solemn promulgation of the divine law, we have, in this chapter, I. The ten commandments, as God himself spoke them upon mount Sinai (v. 1-17), as remarkable a portion of scripture as any in the Old Testament. II. The impressions made upon the people thereby (Exo 20:18-21). III. Some particular instructions which God gave privately to Moses, to be by him communicated to the people, relating to his worship (Exo 20:22, etc.).

20:2 This sentence corresponds to the preamble in the ancient covenant format. It gives the historical setting that makes such an agreement between two parties both possible and reasonable. We are told that the Lord your God was offering the covenant. It was not some unknown deity that offered this special relationship, but the God of Israel’s ancestors who had revealed his power and his care directly to them. Furthermore, that revelation was an act of gracious rescue on their behalf, demonstrating that he is the only God.