4 Bible Verses about Lunatics

And he changed his behavior before them, and pretended himself to be mad in their hands, and marked on the doors of the gate and let his spittle fall down on his beard. Then Achish said to his servants, Lo, you see the man is mad. Why have you brought him to me? Do I have need of mad men, that you have brought this one to show madness in my presence? Shall this one come into my house?

While the word was in the king's mouth, a voice fell from Heaven, saying, O King Nebuchadnezzar, to you it is spoken. The kingdom has departed from you. And they shall drive you from men, and your dwelling shall be with the animals of the field. They shall make you eat grass like oxen, and seven times shall pass over you, until you know that the Most High rules in the kingdom of men, and gives it to whomever He will. The same hour the thing was fulfilled on Nebuchadnezzar. And he was driven from men, and ate grass like oxen, and his body was wet with the dew of the heavens, until his hair had grown like eagles' feathers, and his nails like birds' claws.read more.
And at the end of 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, whose kingdom is an everlasting kingdom, and His rule is from generation to generation. And all the people of the earth are counted as nothing; and He does according to His will in the army of heaven, and among the people of the earth. And none can strike His hand, or say to Him, What are You doing? At that time my reason returned to me. And the glory of my kingdom, my honor and brightness returned to me. And my advisers and my lords came for me, and I was established in my kingdom, and excellent majesty was added to me.

And many of them said, He has a demon and is insane. Why do you hear him?

And he defending himself with these things, Festus said with a loud voice, Paul, you rave! Your many letters turn you to insanity.