After Saul escaped from Damascus, he went to Jerusalem. Not surprisingly, the disciples there don't trust him, since they knew he was part of the persecution that drove many of their friends away. Fortunately, Barnabas (we read chapters ago about how he sold a field and gave the proceeds to the church) speaks up for Saul. It's amazing that God turned a violent persecutor into one of the most effective evangelists for Christ. Along the way, many lesser known characters have a role to play. We never learn our full potential unless we're willing to take some risks, in this case, the risk of trusting a former enemy.