Thomas Brooks emphasizes the transformative power of private communion with God, illustrating how such intimacy leads to a profound hatred for sin and idolatry. He argues that true fellowship with God ignites a fierce indignation against one's cherished sins, compelling believers to cast away their idols, much like the Israelites did with their golden calf. Brooks highlights that through secret prayer, Christians gain strength to confront and overcome their most beloved sins, ultimately finding greater joy and satisfaction in God than in any earthly treasure. He encourages believers to seek this communion, as it is the key to spiritual victory and deeper understanding of God's truth. The sermon calls for a radical rejection of sin, urging that nothing is worth sacrificing one's eternal destiny.

Thomas Brooks emphasizes the necessity of true repentance, which involves turning away from every sin, not just some. He illustrates that partial repentance, like that of Herod and Judas, leads to spiritual ruin, as even one unrepented sin can corrupt the soul. Brooks argues that just as a leper is defined by a single spot, so too is a sinner defined by any unconfessed sin. The penitent must actively seek to crucify all sins and idols in their life to find true healing and restoration. Ultimately, the sermon calls for a complete and thorough renunciation of all that stands against God’s glory.

Thomas Brooks emphasizes the profound anger that true penitents feel towards their own sins, illustrating that this self-directed anger is far greater than any frustration they may have towards others or external circumstances. He argues that genuine repentance involves a deep loathing and abhorrence of sin, which should be the primary focus of a believer's indignation. Brooks encourages believers to redirect their anger away from others and towards their own sinful actions, highlighting that true anger should be reserved for sin itself, not for disagreements with fellow believers.