At this point Paul turns from his rebuke for desertion to an autobiographical account. By clearly setting forth the story of his own loyalty to the gospel, Paul intensifies his rebuke for disloyalty. In contrast to the Galatian believers who turned from the gospel of Christ to follow Jewish customs, Paul tells how he was converted from Judaism and commissioned by God to preach the gospel of Christ and how he was faithful to his commission. His life stands as an eloquent witness to the truth of the gospel.

His autobiography begins with a thesis statement about the origin of the gospel, recounts his conversion and call, describes his first visit with Peter in Jerusalem and the conference with the apostles in Jerusalem, recalls his conflict with Peter in Antioch, and concludes with a personal affirmation of his commitment to live by the gospel.