Ecclesiastes 1:14-17

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

¹⁵The perverse are hard to be corrected, and the number of fools is infinite.

¹⁶I have spoken in my heart, saying: Behold I am become great, and have gone beyond all in wisdom, that were before me in Jerusalem: and my mind hath contemplated many things wisely, and I have learned.

¹⁷And 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,