Paul was horrified by false religion. And many teachers of false religions returned the favor. The beliefs and practices of the enemies of the truth worked to undermine the Gospel. For the Galatians, this meant supplementing the true Gospel of Jesus with works in order for salvation to be effective. Paul’s shock and horror of this comingling makes Galatians one of his most pointed epistles. Yet it is also one of the most important, because—as Bryan Williams shows—it answers the question: “What is true salvation?”