Therefore I went about to cause my heart to despair, &c.— And I considered every way, so that my heart despaired of ever gaining any sort of advantage from all the trouble that I took under the sun; Ecclesiastes 2:21. Since a man who labours wisely, knowingly, and successfully, must nevertheless leave his share to another man who did not join in the labour.
Related Commentaries of Ecclesiastes 2:20
Ecclesiastes 2:20-21
20 Therefore I went about to cause my heart to despair of all the labour which I took under the sun.
21 For there is a man whose labour is in wisdom, and in knowledge, and in equity; yet to a man that hath not laboured therein shall he leavee it for his portion. This also is vanity and a great evil.