As the early church took shape in the mid-first century a.d., a theological struggle of great consequence was joined between the apostle Paul and certain theologians who had intruded into the churches founded by the apostle in Galatia. Writing his letter to the Galatians in the midst of that struggle, Paul was concerned to find a way by which he could assert the radical newness of God's act in Christ while still affirming the positive relation of...