Is salvation God's work, or is it man's work, or is it both God's work and man's work? Another way to put it: Is faith in Jesus Christ alone enough to save us? Is grace enough? In Acts 15, a group came forward in Jerusalem and told the brethren that they needed to be circumcised in order to be saved.

These legalists were known as the Judaizers, and they were influential because they were very schooled in the Law; they were Pharisees. The books of Romans, Galatians and Hebrews hadn't been written yet, so the question of law versus grace hadn't been hammered out... (Continued)