Richard Baxter delivers a powerful sermon on the dangers of fornication and uncleanness, emphasizing that no sin is so vile that it cannot be rationalized by frequent engagement. He argues that the will of God, as expressed in Scripture, is sufficient to condemn such actions, and that our bodies are temples of the Holy Spirit, which should not be defiled. Baxter provides practical directions to avoid temptation, including the importance of self-control, avoiding idleness, and the necessity of marriage for those unable to contain their desires. He warns that those who reconcile their consciences to fornication often become desensitized to other sins, leading to a life devoid of moral integrity. Ultimately, he calls for a return to holiness and the recognition of the severe consequences of sin.