New American Standard Bible (©1995)
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."
King James Bible
And as he thus spake for himself, Festus said with a loud voice, Paul, thou art beside thyself; much learning doth make thee mad.
Darby Bible Translation
And as he answered for his defence with these things, Festus says with a loud voice, Thou art mad, Paul; much learning turns thee to madness.
English Revised Version
And as he thus made his defence, Festus saith with a loud voice, Paul, thou art mad; thy much learning doth turn thee to madness.
Online Parallel Bible