Galatians 3 begins with one of the strongest rebukes in Paul’s letters. He calls the Galatians foolish. That’s a strong word, and most of us wouldn’t react well to being called foolish.
Paul was deeply frustrated, even angry. Throughout the letter, he uses strong language—calling them "foolish Galatians" (Galatians 3:1), expressing bewilderment at their actions, and even emphasizing his urgency with exclamations.
His life changed dramatically when he encountered Jesus on the road to Damascus. Instead of persecuting the church, Paul became one of its greatest defenders.