John Gill

This their way is their folly,.... This their last end becoming like the beasts that perish, which is the issue and event of all their confidence, ambition, and honour, shows the folly of their lives and conduct: or this their course of life, in trusting to their riches; boasting of their wealth; pleasing themselves with the thoughts of the continuance of their houses and dwelling places to all generations; and calling their lands after their own names; all proclaim their folly. Or, as some render the words, "this their way is their hope" or "confidence" (b); they place all their hope and confidence in their riches and honour, which is but a vain hope and a foolish confidence; yet their posterity approve their sayings; they are of the same sentiments with their fathers; they say the same things, and do the same actions; tread in their steps, and follow the same track; though there have been such innumerable instances of the vanity and inconstancy of all worldly riches and grandeur. Selah; on this word; see Gill on Psa 3:2. (b) "est fiducia ipsorum", Cocceius, Gejerus; "stolida fiducia vel spes", Michaelis.