2 Corinthians 12:6-9 New Revised Standard Version (NRSV)
6 But if I wish to boast, I will not be a fool, for I will be speaking the truth. But I refrain from it, so that no one may think better of me than what is seen in me or heard from me, 7 even considering the exceptional character of the revelations. Therefore, to keep[a] me from being too elated, a thorn was given me in the flesh, a messenger of Satan to torment me, to keep me from being too elated.[b] 8 Three times I appealed to the Lord about this, that it would leave me, 9 but he said to me, “My grace is sufficient for you, for power[c] is made perfect in weakness.” So, I will boast all the more gladly of my weaknesses, so that the power of Christ may dwell in me.