Charles H. Spurgeon on Psalms 1:4

"Chaff." Here, by the way, we may let the wicked know they have a thanks to give they little think of; that they may thank the godly for all the good days they live upon the earth, seeing it is for their sakes and not for their own that they enjoy them. For as the chaff while it is united and keeps close to the wheat, enjoys some privileges for the wheat's sake, and is laid up carefully in the barn; but as soon as it is divided, and parted from the wheat, it is cast out and scattered by the wind; so the wicked, whilst the godly are in company and live amongst them, partake for their sake of some blessedness promised to the godly; but if the godly forsake them or be taken from them, then either a deluge of water comes suddenly upon them, as it did upon the old world when Noah left it; or a deluge of fire, as it did upon Sodom, when Lot left it, and went out of the city. Sir Richard Baker.