Ecclesiastes 1:2-3; Ecclesiastes 1:14; Ecclesiastes 1:17
Vanity of vanities, saith the Preacher, vanity of vanities; all is vanity.
What profit hath a man of all his labour which he taketh under the sun?
I have seen all the works that are done under the sun; and, behold, all is vanity and vexation of spirit.
And I gave my heart to know wisdom, and to know madness and folly: I perceived that this also is vexation of spirit.