Galatians 3:1-5 - How foolish is it of them to chase after another gospel? So he wants to bring them back to true salvation, to justification by faith. And again, Paul, time and time again in this letter, rebukes the church for giving their minds and their hearts to another gospel. And he reminds them of what they first heard, of how he had come to them, ministered to them, and how they came to believe. He wants them to realise that the law, the law of God, cannot justify. Man-made law cannot justify. It's only in Christ that a person can be redeemed.