Paul’s purpose in writing this letter to the churches of Galatia is to rebuke them for abandoning the true Gospel for a false one, relying on works of the flesh rather than relying on the Spirit which they received through faith. He is more critical of his audience here than in any other letter, calling them “foolish Galatians” and asking “who has put a spell on you?” He also defends himself against accusations that the gospel he is preaching is man-made rather than God-given. Using his own testimony, the testimony of others, and sound logic from Scripture, Paul argues that the true gospel is received in faith, and that the promise of freedom in Christ has been present in God’s covenant with Abraham all along.