12 I the Preacher have been king over Israel in Jerusalem. 13 And I applied my heart[1] to seek and to search out by wisdom all that is done under heaven. It is an unhappy business that God has given to the children of man to be busy with. 14 I have seen everything that is done under the sun, and behold, all is vanity and a striving after wind.[2] 15 What is crooked cannot be made straight, and what is lacking cannot be counted. 16 I said in my heart, "I have acquired great wisdom, surpassing all who were over Jerusalem before me, and my heart has had great experience of wisdom and knowledge." 17 And I applied my heart to know wisdom and to know madness and folly. I perceived that this also is but a striving after wind. 18 For in much wisdom is much vexation, and he who increases knowledge increases sorrow.
Matthew Henry's Commentary on Ecclesiastes 1:12-18
Commentary on Ecclesiastes 1:12-18
(Read Ecclesiastes 1:12-18)
Solomon tried all things, and found them vanity. He found his searches after knowledge weariness, not only to the flesh, but to the mind. The more he saw of the works done under the sun, the more he saw their vanity; and the sight often vexed his spirit. He could neither gain that satisfaction to himself, nor do that good to others, which he expected. Even the pursuit of knowledge and wisdom discovered man's wickedness and misery; so that the more he knew, the more he saw cause to lament and mourn. Let us learn to hate and fear sin, the cause of all this vanity and misery; to value Christ; to seek rest in the knowledge, love, and service of the Saviour.