Ecclesiastes 1:13-15

¹³And I proposed in my mind to seek and search out wisely concerning all things that are done under the sun. This painful occupation hath God given to the children of men, to be exercised therein.

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.