Ecclesiastes 1:2; 2:21-23

2 Vanity of vanities, says the Preacher, vanity of vanities! All is vanity. 21 because sometimes a man who has toiled with wisdom and knowledge and skill must leave all to be enjoyed by a man who did not toil for it. This also is vanity and a great evil. 22 What has a man from all the toil and strain with which he toils beneath the sun? 23 For all his days are full of pain, and his work is a vexation; even in the night his mind does not rest. This also is vanity.