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 sore travail hath God given to the sons of man to be exercised therewith.

Ecclesiastes 1:16-18

16 I communed with mine own heart, saying, "Lo, I have come to great estate, and have gotten more wisdom than all they that have been before me in Jerusalem; yea, my heart had great experience in wisdom and knowledge."

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

18 For in much wisdom is much grief, and he that increaseth knowledge increaseth sorrow.