The document discusses the differences between two gospels - the gospel of grace and the gospel of works. The gospel of grace teaches that people are declared righteous by faith in God's promise, while the gospel of works teaches that people must obey commands to be righteous. False teachers in Galatia were distorting the gospel of grace and turning people back to the bondage of the law. The document emphasizes that salvation comes through faith in Jesus alone, not by works of the law, as was promised to Abraham.