Ecclesiastes 1:17
17 And I applied my heart to know wisdom and to know qmadness and folly. I perceived that this also is but a striving after wind.
Ecclesiastes 2:12
The Vanity of Living Wisely
12 So I turned to consider wisdom and hmadness and folly. For what can the man do who comes after the king? iOnly what has already been done.
Ecclesiastes 10:13
13 The beginning of the words of his mouth is foolishness,
and the end of his talk is evil madness.
