Galatians 1 discusses the authority of Paul and his message. He asserts that he received his gospel not from any human authority or tradition, but through a revelation from Jesus Christ himself. He also stresses the importance of remaining faithful to the correct teachings of Christ, and not being misled by false teachings or persuasive individuals who may try to divert them from the true path. Paul's message emphasizes salvation through faith in Christ rather than through the works of the law or the circumcision of the flesh.