Berean Standard Bible (BSB)
At this stage of Paul’s defense, Festus exclaimed in a loud voice, “You are insane, Paul! Your great learning is driving you to madness!”
World English Bible (WEB)
As he thus made his defense, Festus said with a loud voice, “Paul, you are crazy! Your great learning is driving you insane!”
Strong's King James
And{G1161} as he{G846} thus{G5023} spake for himself{G626}{(G5740)}, Festus{G5347} said{G5346}{(G5713)} with a loud{G3173} voice{G5456}, Paul{G3972}, thou art beside thyself{G3105}{(G5736)}; much{G4183} learning{G1121} doth make{G4062}{(G5719)} thee{G4571} mad{G1519}{G3130}.
The F.O.G *
(24) Now while he was saying this, defending himself, Festus (Festival) voice says loudly, "Paul! You're raving mad! The many writings are turning you to madness!"
The F.O.G Message *
Young's Literal Translation
And, he thus making a defence, Festus with a loud voice said, ‘Thou art mad, Paul; much learning doth turn thee mad;’