Ambrosiaster : Paul says this because if someone proclaims his own worth in God's sight he is not unwise, for what he says is true. So if anyone talks about the things which have been revealed to him, he is not foolish, though if he keeps quiet about them he is wise. — COMMENTARY ON PAUL'S EPISTLES John Chrysostom : "But if I should even desire to glory, I shall not be foolish; for I shall speak the truth." How then saidst thou before, "Would that ye could bear with me a little in my foolishness;" and, "That which I speak, I speak not after the Lord, but as it were foolishly;" but here, "Though I should even desire to glory, I shall not be foolish?" Not in regard of glorying, but of lying; for if glorying be foolishness, how much more lying? It is then with regard to this that he says, "I shall not be foolish." Wherefore also he added, "For I shall speak the truth; but I forbear, lest any man should account of me above that which he seeth, or that he heareth from me." Here you have the acknowledged reason; for they even deemed them to be gods, on account of the greatness of their miracles. As then in the case of the elements, God hath done both things, creating them at once weak and glorious; the one, to proclaim His own power; the other, to prevent the error of mankind: so truly here also were they both wonderful and weak, so that by the facts themselves were the unbelievers instructed. For if whilst continuing to be wonderful only and giving no proof of weakness, they had by words tried to draw away the many from conceiving of them more than the truth; not only would they have nothing succeeded, but they would even have brought about the contrary. For those dissuasions in words would have seemed rather to spring of lowliness of mind, and would have caused them to be the more admired. Therefore in act and by deeds was their weakness disclosed. — Homily 26 on 2 Corinthians