What is the gospel that Paul preached?

The gospel that Paul preached is clearly outlined in 1 Corinthians 15:3-4, which states that Christ died for our sins according to the scriptures, was buried, and rose again on the third day. This proclamation forms the essence of the Christian faith, highlighting the necessity of Christ's sacrificial death and His triumphant resurrection. Paul made it clear that the gospel is not about philosophical debate or societal issues, but a straightforward declaration of the redemptive work of Christ, aimed at glorifying God and assuring believers of their hope and salvation. It emphasizes that our faith rests upon the completed work of Jesus Christ, not on human efforts.