Ecc 8:16  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,

Ecc 8:17  then I saw all the work of God, that man cannot find out the work that is done under the sun. However much man may toil in seeking, he will not find it out. Even though a wise man claims to know, he cannot find it out.