Paul the Apostle was called by the will of God. In the Book of Acts chapter 8, Saul (later called Paul) is putting Christians in prison. Later Paul has an experience with the risen Christ on the road to Damascus and the vision changes His life forever. God asks the question “Why do you persecute me?” (Acts 9:4). The voice of God was in fact Jesus Christ He was told to go into the city and He would be led by God to know what to do. Ananias is instructed to go to Saul but is afraid because he heard of all the bad things that were done to Christians by Saul (or Paul).  Saul goes on to be a great minister of God and he goes throughout the synagogues preaching the word of God.  Then other people decide that they are going to kill Saul but he is warned of this and is careful to make sure that he is safe. The fact that God took a person who persecuted Christians and sent many into prison for preaching His name can be seen as a great testimony that God can take anyone and use them to fulfill His purpose through them.