2 Corinthians 12:8-10
7 To keep me from becoming conceited because of these surpassingly great revelations, there was given me a thorn in my flesh, a messenger of Satan, to torment me. 8 Three times I pleaded with the Lord to take it away from me. 9But he said to me, "My grace is sufficient for you, for my power is made perfect in weakness." Therefore I will boast all the more gladly about my weaknesses, so that Christ's power may rest on me. 10That is why, for Christ's sake, I delight in weaknesses, in insults, in hardships, in persecutions, in difficulties. For when I am weak, then I am strong.
The audio below is quite long (52 mins) and is aimed at people planting churches, but a lot of the stuff he says, especially about the verses above, is applicable to any Christian and worth listening to...
Darrin Patrick, cultivating a culture of repentance (download here)