How do we know that the preaching of Christ is true?

The preaching of Christ is affirmed through the authority of Scripture and the historical reality of His life, death, and resurrection. In John 17:17, Christ emphasizes that God's word is truth. The transformative effect of preaching on individuals highlights its truth; lives are changed, hearts are softened, and the dead are made alive. The preaching of the cross, as highlighted in 1 Corinthians 1:18, is power for those being saved. This divine power confirms that the message of Christ is not merely theory, but affects profound change in those who hear and believe.