It is my conviction that the Gospel of Grace is not clearly understood by many believers. Paul spoke very strongly about the importance of Grace in what he called "my gospel." He was very critical of those who opposed it or tried to modify it in any way to the point of wanting those who attempted to mutilate the Gospel of Grace to "mutilate themselves." Why did he feel so strongly about this? Paul knew legalism well. He had been the chief legalist. No one is more adamant against a wrong than a former practitioner. Once grace was revealed to Paul he wanted every believer to be free of legalism because "the law kills, but the Spirit gives life." Read this commentary on Galatians which is Paul's strongest grace teaching. It will expose legalism in yourself and others and set you free in any place where you as a believer need more freedom.