Ecclesiastes 1:16-18 ESV

16 I said in my heart, "I have acquired great 1wisdom, surpassing all who were over Jerusalem before me, and my heart has had great experience of wisdom and knowledge."

References for Ecclesiastes 1:16

17 And I 2applied my heart to know wisdom and to know 3madness and folly. I perceived that this also is but 4a striving after wind.

References for Ecclesiastes 1:17

      18 For 5in much wisdom is much vexation, and he who increases knowledge increases sorrow.

      References for Ecclesiastes 1:18