Steve Grochow delves into the concept of sin, emphasizing the importance of knowledge and free will in making moral choices. He distinguishes between natural and moral attributes, highlighting that sin is a result of a deliberate choice to rebel against God's authority. The sermon explores the origins of sin, the misconception of a sin nature, and the responsibility individuals hold for their own actions. Grochow challenges the idea of sin as a hereditary trait, emphasizing that sin is a personal choice and rebellion against God's rightful rule.