Ecclesiastes 1:13; Ecclesiastes 1:16-18
And I applied my mind to seek and to search out by wisdom all that is done under heaven; it is an unhappy business that God has given to the sons of men to be busy with.
I said to myself, "I have acquired great wisdom, surpassing all who were over Jerusalem before me; and my mind has had great experience of wisdom and knowledge."
And I applied my mind to know wisdom and to know madness and folly. I perceived that this also is but a striving after wind.
For in much wisdom is much vexation, and he who increases knowledge increases sorrow.