when i applied my heart to know wisdom and to see the business that is done on earth, even though one sees no sleep day or night, then i saw all the world of God, that a man cannot find out the work that is done under the sun.  for though a man labors to discover it, yet he will not find it; moreover, though a wise man attempts to know it, he will not be able to find it.  for i considered all this in my heart, so that i would declare it all: that the righteous and the wise and their works are in the hand of God.

ecclesiastes 8:16-9:1.