Commentaries:
Jamieson, Fausset, and Brown
this sore travail--namely, that of "searching out all things done under heaven." Not human wisdom in general, which comes afterwards (Ecclesiastes 2:12, etc.), 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 (Genesis 3:19) [GILL].
exercised--that is, disciplined; literally, "that they may thereby chastise, or humble themselves."
Other commentary entries containing this verse:
Ecclesiastes 1:14
Ecclesiastes 1:15
Ecclesiastes 1:18
Ecclesiastes 2:12
Ecclesiastes 3:10
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