4 Bible Verses about Lunatics

And he changed his countenance before them, and raved in their hands, and scrabbled on the doors of the gate, and let his spittle fall down upon his beard. Then said Achish unto his servant, "Lo, ye saw that this man was beside himself; wherefore then have ye brought him to me? Lack I madmen, that ye have brought this fellow to play the madman in my presence? He shall not come into my house."

While these words were yet in the king's mouth, there fell a voice from heaven, saying, "O king Nebuchadnezzar, to thee be it spoken, 'Thy kingdom is departed from thee. Thou shalt be cast out of men's company: thy dwelling shall be with the beasts of the field, so that thou shalt eat grass like as an ox, till seven years be come and gone over thee: even until thou knowest, that the highest hath power upon the kingdoms of men, and that he may give them, unto whom it pleaseth him.'" The very same hour was this matter fulfilled upon Nebuchadnezzar: so that he was cast out of men's company, and ate grass like an ox; His body was wet with the dew of heaven, till his hairs were as great as Eagle's feathers, and his nails like bird's claws.read more.
When this time was past, I, Nebuchadnezzar, lift up mine eyes unto heaven, and mine understanding was restored unto me again. Then gave I thanks to the highest. I magnified and praised him that liveth for evermore, whose power endureth alway, and his kingdom from one generation to another: in comparison of whom, all they that dwell upon the earth are to be reputed as nothing. He handleth according to his will, among the powers of heaven and among the inhabiters of the earth - and there is none that may resist his hand, or say, 'What doest thou?' At the same time was mine understanding given me again, and I was restored to the honour of my kingdom, to my dignity, and to my own shape again. My great estates and princes sought unto me, and I was set in my kingdom again, so that I had yet greater worship.

and many of them said, "He hath the devil, and is mad: why hear ye him?"

As he thus answered for himself: Festus said with a loud voice, "Paul, thou art besides thyself. Much learning hath made thee mad."