Some early Jewish Christians believed that, in addition to the teachings of Jesus Christ, circumcision and the observance of the Mosaic Law were necessary for salvation and for Gentile converts. In Acts 15:1: “But some men came down from Judea and were teaching the brethren, ‘Unless you are circumcised according to the custom of Moses, you cannot be saved.’” It was in opposition to this heresy and it’s insistence on “works of the law” that Paul wrote his epistles to the Romans and the Galatians (Galatians 2:12 & 5:2, Romans 2:28-29, Colossians 2:11-12).