'Crazy' in the Bible

So David changed his behavior before them and acted like he was crazy in their presence. He scribbled on the doors of the gate, and let his saliva run down his beard.

The LORD made you a priest instead of Jehoiada the priest to serve in the LORD's Temple as an official against every crazy prophet, and to put him in stocks and restraints.

As he continued his defense, Festus shouted, "You're out of your mind, Paul! Too much education is driving you crazy!"

So if we were crazy, it was for God; if we are sane, it is for you.