Paul is upset that the Galatians have been led astray by a group of Judaizers into thinking they need to be circumcised to be Christians. He starts his apologetic case against them by establishing his authority and by pointing out the confirmation he received from Peter, James, and Paul. More logic to come.
Galatians Week 1: Techniques for Slow Growth
Galatians Week 2: The Key to the Covenant
Galatians Week 3: Breaking the Shackles
Galatians Week 4: Respecting the Whole Law
Galatians Week 5: True Fruit