Deacon Jim Knipper discusses the dialogue between Jesus and Peter, emphasizing the contrast between Peter's divine insight and his human responses to Jesus' predictions of suffering. The sermon explores the voices that influence our thoughts and actions, distinguishing between God's loving voice and the ego-driven mental voice that often leads to fear and unloving behavior. Knipper encourages reflection on the sources of our thoughts in challenging situations and highlights the importance of following Christ's teachings of love and self-denial.