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