Behold, they are all vanity; their works are nothing: their molten images are wind and confusion.

Wesley's Notes

41:29 Behold - This is the conclusion of the dispute, but under these he comprehends all images whatsoever. Wind - Empty and unsatisfying things. Confusion - Confused and useless things, like that rude heap in the beginning of God's creation, of which this very word is used, Gen 1:2.

Jamieson-Fausset-Brown Bible Commentary

29. confusion-"emptiness" [Barnes].

Matthew Henry's Concise Commentary

41:21-29 There needs no more to show the folly of sin, than to bring to notice the reasons given in defence of it. There is nothing in idols worthy of regard. They are less than nothing, and worse than nothing. Let the advocates of other doctrines than that of salvation through Christ, bring their arguments. Can they tell of a cure for human depravity? Jehovah has power which cannot be withstood; this he will make appear. But the certain knowledge of the future must be only with Jehovah, who fulfils his own plans. All prophecies, except those of the Bible, have been uncertain. In the work of redemption the Lord showed himself much more than in the release of the Jews from Babylon. The good tidings the Lord will send in the gospel, is a mystery hid from ages and generations. A Deliverer is raised up for us, of nobler name and greater power than the deliverer of the captive Jews. May we be numbered among his obedient servants and faithful friends.