The sermon’s core argument is that Jesus Christ is the one God of both Testaments, identified as the Father, the Rock, and the Creator, using scriptures like 1 Corinthians 10:4, Deuteronomy 32, Isaiah 9:6, and Revelation to refute Trinitarianism. It emphasizes the singular nature of God (via Hebrew terms El, Eloah, Elohim, and echad) and equips believers to defend Oneness theology with biblical and contextual clarity.