13 And I ^japplied my heart¹ to seek and to ^ksearch out by wisdom all that is done under heaven. It is an ^lunhappy ^mbusiness that God has given to the children of man to be busy with.

17 And I applied my heart to know wisdom and to know ^qmadness and folly. I perceived that this also is but a striving after wind.

16 When I applied my heart to know wisdom, and to see the business that is done on earth, how neither day nor night do one’s eyes see sleep,