John Gill discusses the teachings of Clement of Rome, emphasizing the doctrine of predestination and the elect of God. He highlights Clement's affirmation that God's will is sovereign and immutable, asserting that all things are accomplished according to His purpose. Gill notes that Clement identifies a specific number of the elect and emphasizes the importance of love and unity among them. He also points out that spiritual blessings, including repentance, are reserved for the elect, and that God's election is through Jesus Christ. This sermon underscores the foundational Christian belief in God's sovereign choice and the assurance it brings to believers.