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.