Paul had brought the gospel message to the people of Galatia and they had been set free! But in his absence, the "agitators" had brought a two pronged attack into the Galatian churches, they took aim at the man and the message. On the one hand they were attacking Paul, his background, character, apostleship and authority. On the other, they were attacking the gospel Paul had preached, bringing doubt into its origin, authenticity, validity and authority. Last week we saw that Paul began his letter with a tone of exceptional disapproval and shock, as the Galatian churches were being led astray by these agitators and false teachers. What we will look at this week is how Paul uses his life story to remove all doubt about his authority and the authority of the gospel he preached.