Lesson 5: Begun by the Spirit, Completed by the Flesh?

Dr. Don Campbell’s commentary on Galatians (from The Bible Knowledge Commentary):
In the first two chapters of the epistle, Paul established the divine origin of his apostleship and his message. Then he turned to the Galatians who were being urged to add works to faith, to keep the Mosaic Law in addition to placing faith in Christ, as the grounds of acceptance before God. The Judaizers believed the Galatian Christians would receive a more complete salvation and a greater sanctification if they obeyed the Law. But Paul argued that to supplement the work of Christ is to supplant it. There can only be one way of salvation, and that is by faith in Christ alone.