Saul (who would become Paul) stood by at the stoning of Stephen. He was a good Jew, who kept all of the law. In other words, he was an enemy of the early Christians.
This made Saul an unlikely choice to be God’s messenger!
Abraham Lincoln was raised in a log cabin, his mother died when he was 9, he didn’t finish high school or college, he lost 8 of 13 elections in his life. Yet, he was elected President of the United States.
In a similar way, God used someone we wouldn’t expect in a very important way.
Video: “Peter & Paul - Saul’s conversion”
Saul had to overcome his reputation as a man dangerous to Christians and regain their trust: first, with Ananias, then with the disciples in Jerusalem.
At the same time, his own standing among the Jews took a hit: he had to escape from Damascus, and then angered the Jews in Jerusalem. The apostles sent him by ship to Tarsus.
Paul would go on to suffer greatly for standing up for Jesus - see 2 Corinthians 11.
Paul had great knowledge and kept the law - but it was his encounter with the living God that actually changed him.