Galatians is a passionate defense of justification by faith and Christian freedom against Judaizing legalism. Written in response to false teachers who insisted that Gentiles must be circumcised and follow Mosaic law to be saved, Paul vigorously defends the gospel of grace. The letter establishes that salvation is by faith in Christ alone, not by works of law, and that Christians have been freed from legal bondage to live in spiritual freedom. Paul presents both autobiographical and theological arguments to demonstrate the authority of his gospel and the superiority of the New Covenant.