The sermon focuses on proving the resurrection of Jesus Christ, building upon previous discussions of prophecy to now highlight eyewitness accounts and the subsequent outpouring of the Holy Spirit. Drawing from Old Testament passages like Psalm 110, the preacher establishes Jesus's divine authority and ascension, emphasizing that His resurrection and the sending of the Spirit are tangible proofs of God's actions. The message culminates in a call to acknowledge Jesus as both Lord and Christ, urging listeners to embrace Him as the cornerstone of their faith and to live as witnesses to His transformative power.