God is the Law Giver

Deuteronomy 6:4 Hear, O Israel: The Lord our God is one Lord.

The Ten Commandments were spoken by God Himself, and were written by His own hand. They are of divine, and not of human composition. But the Bible, with its God-given truths expressed in the language of men, presents a union of the divine and the human. Such a union existed in the nature of Christ, who was the Son of God and the Son of man. Thus it is true of the Bible, as it was of Christ, that "the Word was made flesh, and dwelt among us" (John 1:14). {LHU 117.5}

God graciously spoke his law and wrote it with his own finger on stone, making a solemn covenant with his people at Sinai. God acknowledged them as his peculiar treasure above all people upon the earth. Christ, who went before Moses in the wilderness, made the principles of morality and religion more clear by particular precepts, specifying the duty of man to God and his fellow-men, for the purpose of protecting life, and guarding the sacred law of God, that it should not be entirely forgotten in the midst of an apostate world. {RH, May 6, 1875 par. 14}

Exodus 20:3 "You shall have no other gods before me."

The first four commandments enjoined upon man his duty to serve the Lord our God with all the heart, and with all the soul, and with all the mind, and with all the strength. This takes the whole man. This requires a love so fervent, so intense, that man can cherish nothing in his mind or affections in rivalry with God; and his works will bear the signature of heaven. Everything is secondary to the glory of God. Our heavenly Father is to be ever cherished as the first, the joy and prosperity, the light and sufficiency of our life, and our portion forever. {SD 56.3}

Exodus 34:14 for you shall worship no other god, for the Lord, whose name is Jealous, is a jealous God