The Giving of the Law at Sinai is one of the most dramatic events in the Old Testament and one of the most important in redemptive history. Three months after the Exodus, Israel camped at the foot of Mount Sinai. For three days the people consecrated themselves. Then "on the morning of the third day, there were thunderings and lightnings, and a thick cloud on the mountain; and the sound of the trumpet was very loud, so that all the people who were in the camp trembled" (Exodus 19:16). Mount Sinai was "completely in smoke, because the LORD descended upon it in fire" (19:18), and the mountain quaked greatly. The whole assembly was told to keep their distance or die. In that terrifying setting, God gave the Ten Commandments (Exodus 20:1-17), followed by detailed case law, ceremonial regulations, and instructions for the tabernacle. The people responded: "All that the LORD has said we will do, and be obedient" (24:7). Moses sprinkled blood on the altar and the people, and the covenant was ratified. Why does this matter so much? (1) The Law revealed God's character — His holiness, justice, mercy, and moral will. (2) It set Israel apart from the nations as God's treasured possession. (3) It exposed sin — "by the law is the knowledge of sin" (Romans 3:20). (4) It pointed to Christ — "the law was our tutor to bring us to Christ" (Galatians 3:24). Hebrews contrasts Sinai with Zion: at Sinai the people drew back in terror from a mountain that could not be touched; at Zion we come to "Jesus the Mediator of the new covenant" whose blood "speaks better things than that of Abel" (Hebrews 12:18-24). The Law was good and holy and could not save. Only Christ could fulfill the Law and save. The giving of the Law is not the gospel, but without it the gospel cannot be understood.