'Madness' in the Bible

I applied my heart to know wisdom, and to know madness and folly. I perceived that this also was a chasing after wind.

I turned myself to consider wisdom, madness, and folly: for what can the king's successor do? Just that which has been done long ago.

I turned around, and my heart sought to know and to search out, and to seek wisdom and the scheme of things, and to know that wickedness is stupidity, and that foolishness is madness.

This is an evil in all that is done under the sun, that there is one event to all: yes also, the heart of the sons of men is full of evil, and madness is in their heart while they live, and after that they go to the dead.

The beginning of the words of his mouth is foolishness; and the end of his talk is mischievous madness.