²¹ because sometimes one who has toiled with wisdom and knowledge and skill must leave all to be enjoyed by another who did not toil for it. This also is vanity and a great evil. ²² What do mortals get from all the toil and strain with which they toil under the sun? ²³ For all their days are full of pain, and their work is a vexation; even at night their minds do not rest. This also is vanity.