Ecclesiastes 1:12-15

I the Preacher was king over Israel in Jerusalem. And I applied my heart to seek and to search out by wisdom concerning all that is done under heaven: it is a sore travail that God hath given to the sons of men to be exercised therewith. I have seen all the works that are done under the sun; and, behold, all is vanity and a striving after wind. That which is crooked cannot be made straight; and that which is wanting cannot be numbered.