How do we know that preaching is true?

According to the sermon, true preaching is marked by its fidelity to the gospel of Jesus Christ. Paul sets a clear distinction in 1 Corinthians 2 by stating that he was determined not to know anything among them except 'Jesus Christ and Him crucified'. True preaching also avoids theatrics or attempts to appeal to human sentiment; instead, it relies wholly on the Spirit's demonstration and power. Believers are encouraged to measure what they hear against Scripture, ensuring that God alone receives the glory through the message conveyed.