Today's Sunday School examines the theological reality that corrupted nature remains in believers even after regeneration, as outlined in the 1689 Confession. It explores the ongoing internal conflict between the flesh and the Spirit, citing Romans 7 to illustrate that while believers are positionally justified and pardoned, they still struggle with actual transgression and the first motions of sin. Pastor Jason distinguishes between the guilt of sin, which is fully covered by Christ, and the presence of sin, which requires continual mortification and vigilance. By referencing James 1 and Galatians 5, the message emphasizes that even internal lusts and thoughts are considered sin, urging believers to reject these first motions quickly rather than cherishing them. The teaching ends with comfort in the assurance of no condemnation while challenging the listener to maintain a holy life through constant reliance on God's grace.