In this sermon, the preacher focuses on the story of Moses and the Israelites in the book of Exodus. He highlights the concept of atonement, which was a way to cover up sin before the coming of Christ. Moses confesses the sin of the people, acknowledging their worship of golden idols. He emphasizes the importance of confessing sin and agreeing with God about it. Moses even offers to be blotted out of God's book if it means the people will be forgiven. God responds by saying that He will deal individually with those who have sinned, but He will still lead the people to the promised land with His angel. The preacher also mentions that the angel of the Lord represents the visible presence of Christ in the Old Testament.

Thomas Brooks emphasizes the undeniable connection between sin and punishment, warning that one cannot escape the consequences of their actions. He references Galatians 6:7 to illustrate that what we sow, we will reap, and he reinforces this truth with examples from Exodus and Psalms that highlight God's commitment to justice. Brooks urges listeners to recognize the seriousness of sin and the certainty of divine retribution, reminding them that God will not be mocked.