Saul of Tarsus had a lot of things to boast about. He had won the “gold medal” in achievements and thus boasting. He came from the right Tribe, the right family, the right schooling and moved in all the right social circles. He had it made! (Or so he thought!)
Then he met Jesus and his life and boasting were turned upside down. His entire thought process did a one-eighty as he realized next to Jesus and the glory that was revealed he (Saul of Tarsus) had nothing to boast about … except … because he said, “But God forbid that I should boast except in the cross of our Lord Jesus Christ, by whom the world has been crucified to me, and I to the world.” From the moment of His conversion, Saul learned more and more of the wonder of Jesus, the gift of salvation and the power of His resurrection.
The depth of this glorious revelation served only to humble this proud man’s heart and bring him to the place of only boasting in the cross of Christ. The penetration of this revelation into his heart took Saul (Paul the Apostle) ever deeper so that even the whole world was crucified to him. Jewish tradition and the old means of boasting were removed so that not even circumcision availed anything. He was left to boast in the cross and the new creation it brought forth.