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.

13. this sore travail—namely, that of "searching out all things done under heaven." Not human wisdom in general, which comes afterwards (Ec 2:12, &c.), but laborious enquiries into, and speculations about, the works of men; for example, political science. As man is doomed to get his bread, so his knowledge, by the sweat of his brow (Ge 3:19) [Gill].

exercised—that is, disciplined; literally, "that they may thereby chastise, or humble themselves."