King James Version
And as he thus spake for himself, Festus said with a loud voice, Paul, thou art beside thyself; much learning doth make thee mad.English Standard Version
And as he was saying these things in his defense, Festus said with a loud voice, "Paul, you are out of your mind; your great learning is driving you out of your mind."Catholic Public Domain Version
While he was speaking these things and presenting his defense, Festus said with a loud voice: "Paul, you are insane! Too much studying has turned you to insanity.