15. That which is crooked cannot be made straight, and that which is lacking cannot be numbered.
16. I communed with my own heart, saying, Behold, I am come to great estate and have gotten more wisdom than all those that have been before me in Jerusalem; and my heart had great experience of wisdom and knowledge.
17. And I gave my heart to know wisdom and knowledge and to know folly and those who are mad; I learned in the end that this also is vexation of spirit.
18. For in much wisdom is much grief, and he that increases knowledge increases sorrow.