Ecclesiastes 8:14-17 - Man Cannot Know God's Ways
14 There is another vanity which is done upon the earth: that there are just men, who are recompensed as if they had done according to the work of the wicked; again, there are wicked men, who are recompensed as if they had done according to the work of the righteous; I say that this also is vanity. 15 Therefore I commended joy because a man has no better thing under the sun than to eat and to drink and to be merry, for that shall abide with him of his labour the days of his life, which God gives him under the sun.
16 Therefore I applied mine heart to know wisdom and to see the business that is done upon the earth (for also there is he that neither day nor night sees sleep with his eyes). 17 And I have seen regarding all the works of God that man cannot attain to understand the work that is being done under the sun, because though a man labours to seek it out, yet he shall not find it; even though the wise man says that he knows it, yet he shall not be able to attain it.