4 Bible Verses about Lunatics

And he changed his behavior before them, and feigned himself mad in their hands, and scrabbled on the doors of the gate, and let his spittle fall down upon his beard. Then Achish said to his servants, Lo, ye see the man is mad. Why then have ye brought him to me? Do I lack madmen, that ye have brought this fellow to play the madman in my presence? Shall this fellow come into my house?

While the word was in the king's mouth, a voice from heaven fell, [saying], O king Nebuchadnezzar, to thee it is spoken: The kingdom is departed from thee. And thou shall be driven from men, and thy dwelling shall be with the beasts of the field. Thou shall be made to eat grass as oxen, and seven times shall pass over thee, until thou know that the Most High rules in the kingdom of me The same hour the thing was fulfilled upon Nebuchadnezzar. And he was driven from men, and ate grass as oxen. And his body was wet with the dew of heaven, till his hair was grown like eagles' [feathers], and his nails like birds' [read more.
And at the end of the days I, Nebuchadnezzar, lifted up my eyes to heaven, and my understanding returned to me. And I blessed the Most High, and I praised and honored him who lives forever. For his dominion is an everlasting domini And all the inhabitants of the earth are reputed as nothing, and he does according to his will in the army of heaven, and among the inhabitants of the earth. And none can stay his hand, or say to him, What are thou doing? At the same time my understanding returned to me, and for the glory of my kingdom, my majesty and brightness returned to me, and my counselors and my lords sought to me. And I was established in my kingdom, and excellent greatness

And many of them said, He has a demon, and is mad. Why do ye listen to him?

And while he made a defense by these things, Festus said in a loud voice, Paul, thou are mad. Much scholarship is driving thee into madness.