How do we come to Christ? Sometimes it is the example of other people. It may be their courage, their love of the Lord, their willingness to change for the sake of the gospel. Somehow God touches us. We have an encounter with God and our lives are changed.
That is what happened to Paul as we read in the Acts of the Apostles. He was persecuting Christians. He approved of the death of Stephen. But then he receives a call from God and is given the courage to change. Paul was a sinner and became a saint. Maybe there is hope for me, too!