Paul’s story is located in the book of Acts in the Bible. Paul was a persecutor of Christians. That’s right. He persecuted (killed) Christians. At this point, he was called Saul. He witnessed Christians being persecuted. He was an evil person. And the bad part was was that he thought he was doing the right thing. He thought that the Christians were evil, while he was doing the evil part. When he was on his way to Damascus to persecute Christians, the Angel of the Lord appeared in front of him and changed his life forever. The story is told here, in Acts 9: 1-9,
9 Meanwhile, Saul was still breathing out murderous threats against the Lord’s disciples. He went to the high priest 2 and asked him for letters to the synagogues in Damascus, so that if he found any there who belonged to the Way, whether men or women, he might take them as prisoners to Jerusalem. 3 As he neared Damascus on his journey, suddenly a light from heaven flashed around him. 4 He fell to the ground and heard a voice say to him, “Saul, Saul, why do you persecute me?”
5 “Who are you, Lord?” Saul asked.
“I am Jesus, whom you are persecuting,” he replied. 6 “Now get up and go into the city, and you will be told what you must do.”
7 The men traveling with Saul stood there speechless; they heard the sound but did not see anyone. 8 Saul got up from the ground, but when he opened his eyes he could see nothing. So they led him by the hand into Damascus. 9 For three days he was blind, and did not eat or drink anything.
He regained his sight later, but that meeting changed his whole life. From that point on, he was called Paul and he proclaimed the true gospel of Jesus Christ. His enemies (Christians) became his friends. He went on multiple missionary missions and brought many people to Jesus.