For man does not know his time. Like fish that are taken in an evil net, and like birds that are caught in a snare, so the children of man are snared at an evil time, when it suddenly falls upon them.
The preacher here, for a further proof of the vanity of the world, and to convince us that all our works are in the hand of God, and not in our own hand, shows the uncertainty and contingency of future events, and how often they contradict the prospects we have of them.
Commenting on Ecclesiastes 9:11-12
For man also knoweth not his time,.... Though it is fixed and settled by the Lord, yet times and seasons are kept in his own power, and not known by men; not the time of his death, nor of any calamity and distress coming upon him, nor the proper season and opportunity of doing himself good, and avoiding evil; as the fishes that are taken...
his time--namely, of death (Ecc 7:15; Isa 13:22). Hence the danger of delay in doing the work of God, as one knows not when his opportunity will end (Ecc 9:10). evil net--fatal to them. The unexpected suddenness of the capture is the point of comparison. So the second coming of Jesus Christ, "as a snare" (Luk 21:35). evil time--as an "evil net," fatal to them.