How do we know that the gospel preached by Paul is true?

Paul's affirmation of the gospel he preached comes directly from God, who revealed it to him (Galatians 1:12). Unlike contemporary claims of new revelations, Paul's inspiration is rooted in the objective and authoritative Word of God. This gospel, centered on Christ's work of redemption, aligns with the scriptures and the teachings of the early apostles. The consistency of this message through the ages — upheld by countless faithful preachers and grounded in biblical doctrine — confirms the truth of Paul's proclamation. As Peter noted, we have a more sure word of prophecy in the Scriptures, which testifies to the truths of the gospel.