2 Corinthians 12:6-7

But if I wanted to brag about myself, I would not be a fool, because I would be telling the truth. But I will not brag about myself. I do not want people to think more of me than what they see me do or hear me say. So that I would not become too proud of the wonderful things that were shown to me, a painful physical problem was given to me. This problem was a messenger from Satan, sent to beat me and keep me from being too proud.