I am the LORD thy God, which have brought thee out of the land of Egypt, out of the house of bondage.
God spoke these words Himself with dreadful pomp, not merely whispered through conscience or providence, but with the authority of Jehovah, the self-existent One. He bound Israel threefold: by His nature as eternal Lord, by covenant as their God, and by His power to reward obedience and punish disobedience.
AI summary
Commenting on Exodus 20:1-11
I am the Lord thy God,.... This verse does not contain the first of these commands, but is a preface to them, showing that God had a right to enact and enjoin the people of Israel laws; and that they were under obligation to attend unto them with reverence, and cheerfully obey them, since he was the Lord, the eternal and immutable Jehovah, the Being...
I am the Lord thy God--This is a preface to the ten commandments--the latter clause being specially applicable to the case of the Israelites, while the former brings it home to all mankind; showing that the reasonableness of the law is founded in their eternal relation as creatures to their Creator, and their mutual relations to each other.