And I set my heart to seek and search out by wisdom concerning all that is done under heaven; this burdensome task God has given to the sons of man, by which they may be exercised.
All this I have seen, and applied my heart to every work that is done under the sun: There is a time in which one man rules over another to his own hurt.
There is one alone, without companion: He has neither son nor brother. Yet there is no end to all his labors, Nor is his eye satisfied with riches. But he never asks, “For whom do I toil and deprive myself of good?” This also is vanity and a grave misfortune.