Ecclesiastes 1:12-14

¹²I the preacher was king over Israel in Jerusalem.

¹³And I gave my heart to seek and search out by wisdom concerning all things that are done under heaven: this grievous labor hath God given to the sons of man to be exercised with it.

¹⁴I have seen all the works that are done under the sun; and behold, all is vanity and vexation of spirit.