Ecclesiastes 8:7; Ecclesiastes 8:15; Ecclesiastes 8:17

7 for he knoweth not that which shall be; for who can tell him how it shall be?

15 Then I commended mirth, because a man hath no better thing under the sun, than to eat, and to drink, and to be joyful: for that shall abide with him in his labor [all] the days of his life which God hath given him under the sun.

17 then I beheld all the work of God, that man cannot find out the work that is done under the sun: because however much a man labor to seek it out, yet he shall not find it; yea moreover, though a wise man think to know it, yet shall he not be able to find it.