While Paul was saying this in his defense, Festus *said in a loud voice, “Paul, you are out of your mind! Your great learning is driving you mad.” But Paul *said, “I am not out of my mind, most excellent Festus, but I utter words of sober truth.
1 Corinthians 4:10, We are fools for Christ’s sake, but you are prudent in Christ; we are weak, but you are strong; you are distinguished, but we are without honor.
Paul later in the letter to the Corinthians refers to himself as a ‘fool for Christ’ in contrast to the prideful, self-promoting, ‘wise’ Corinthians. Sometimes the most powerful, life changing truth appears the most foolish to those who are full of self importance and are not willing to hear it.