The ungodly are not so: but are like the chaff which the wind drives away.
All Commentaries on Psalms 1:4 Go To Psalms 1
Hilary of Poitiers
The next point after the prophet had set forth the man's perfect happiness was for him to declare what punishment remained for the ungodly. Thus there ensues: The ungodly are not so, but are like the dust which the wind drives away from the face of the earth. The ungodly have no possible hope of having the image of the happy tree applied to them; the only lot that awaits them is one of wandering and winnowing, crushing, dispersion and unrest; shaken out of the solid framework of their bodily condition, they must be swept away to punishment in dust, a plaything of the wind. They shall not be dissolved into nothing, for punishment must find in them some stuff to work on, but ground into particles, imponderable, unsubstantial, dry, they shall be tossed to and fro, and make sport for the punishment that gives them never rest. Their punishment is recorded by the same Prophet in another place where he says: I will beat them small as the dust before the wind, like the mire of the streets I will destroy them.
Thus as there is an appointed type for happiness, so is there one for punishment. For as it is no hard task for the wind to scatter the dust, and as men who walk through the mud of the streets are hardly aware that they have been treading on it, so it is easy for the punishment of hell to destroy and disperse the ungodly, the logical result of whose sins is to melt them into mud and crush them into dust, reft of all solid substance, for dust and mud they are, and being merely mud and dust are good for nothing else than punishment.