Ecclesiastes 1:13; Ecclesiastes 1:16-18

Ecclesiastes 1:13

13 And I gave my heart to seek and search out by wisdom concerning all [things] that are done under heaven: this grievous labor hath God given to the sons of man to be exercised with it.

Ecclesiastes 1:16-18

16 I communed with my own heart, saying, Lo, I have come to great estate, and have gained more wisdom than all [they] that have been before me in Jerusalem: and my heart had great experience of wisdom and knowledge.

17 And I gave my heart to know wisdom, and to know madness and folly: I perceived that this also is vexation of spirit.

18 For in much wisdom [is] much grief: and he that increaseth knowledge increaseth sorrow.