Saul-to-Paul (Acts 9:1-22): Saul was a Pharisee who sought out to persecute the Christians. One day, as Saul went to Damascus to seek Christians to kill, Jesus appeared to Saul, saying "Saul, Saul why are you persecuting me?" (Acts 9:4). When Saul realized that Jesus is Lord, he repented, and was blind for three days before regaining his sight. When Saul gained his sight, did not just regain his sight physically, but he regained them spiritually, and as a result adopted the name Paul (Roman name), to spread the gospel to the Jews and Gentiles (non-Jews). Paul went on to write 2/3rds of the New Testament. Paul's story is a real testimony of God's transformative work within a person because of the gospel, which is something Saul would not have been able to achieve as a Pharisees. Though in the law, he was the highest of them all, his righteousness was like "fifty rags," compared to the holiness of God (Philippians 3:4-10)
"But when one turns to the Lord, the veil is removed. Now the Lord is the Spirit, and where the Spirit of the Lord is, there is freedom. And we all, with unveiled face, beholding the glory of the Lord, are being transformed into the same image from one degree of glory to another. For this comes from the Lord who is the Spirit" (2 Corinthians 3:16-18).