Ecclesiastes 2:15; Ecclesiastes 2:19; Ecclesiastes 7:16; Ecclesiastes 7:23

15 Then I said to myself, "As is the fate of the fool, it will also befall me. Why then have I been extremely wise?" So I said to myself, "This too is vanity."

19 And who knows whether he will be a wise man or a fool? Yet he will have control over all the fruit of my labor for which I have labored by acting wisely under the sun. This too is vanity.

16 Do not be excessively righteous and do not be overly wise. Why should you ruin yourself?

23 I tested all this with wisdom, and I said, "I will be wise," but it was far from me.