Ecclesiastes 1:2-3; Ecclesiastes 1:14; Ecclesiastes 1:17

2 Vanity of vanities, said Ecclesiastes: vanity of vanities, and all is vanity. 3 What hath a man more of all his labour, that he taketh under the sun?
14 I have seen all things that are done under the sun, and behold all is vanity, and vexation of spirit.
17 And I have given my heart to know prudence, and learning, and errors, and folly: and I have perceived that in these also there was labour, and vexation of spirit,