Gal. 6:14 As for me, God forbid that I should boast about anything except the cross of our Lord Jesus Christ. Because of that cross, my interest in this world died long ago, and the world's interest in me is also long dead.
He could have, many would say he should have, but the Apostle Paul refused to brag about his accomplishments and pedigree in life. Paul was on top of his world before he encountered the living Christ and was forever changed. Paul was on a fast track for success in the religious community. He had it all going for him and no one was stopping him.
When Paul entered into a relationship with Christ, the only thing that then mattered to him was his salvation. Paul understood the worth of his salvation. He understood what Jesus did for him at Calvary and how it changed his life. He lost all interest in what his life was all about. He no longer cared about the things he had valued so much before Christ. He knew how wrong he had been and poured himself into his new life in Christ. His interest quickly became to study and understand the Scriptures and how they were fulfilled in Christ. He was consumed with a passion to pass on to as many people as he could the wonderful Good News of salvation and he warned people about what would happen if they rejected it.
As a result of his changed life, the world lost all interest in him. Paul was heading in a totally different direction and in fact, he was often persecuted for his faith, many times to the point of near death. He quickly became the enemy of those who refused to accept Jesus as the promised Messiah. Paul became for us an example worthy to be followed. Nothing in life should matter more to us than our salvation and our living in Christ.