I have become a fool in boasting; you have compelled me: for I ought to have been commended by you: for in nothing am I behind the very chief apostles, though I be nothing.
All Commentaries on 2 Corinthians 12:11 Go To 2 Corinthians 12
Ambrosiaster
AD 400
Paul is saying that he has been forced to disclose the truth of the matter. He is certainly not foolish, having spoken the truth about himself, but is abasing himself in this way in order to make it clear that he is not putting his own merits on display voluntarily. Commentary on Paul’s Epistles.