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

2 Vanity of vanities, says the Preacher, vanity of vanities! All is vanity. 3 What does man gain by all the toil at which he toils under the sun?
14 I have seen everything that is done under the sun; and behold, all is vanity and a striving after wind.
17 And I applied my mind to know wisdom and to know madness and folly. I perceived that this also is but a striving after wind.