Charles H. Spurgeon on Psalms 99:8

Thou... forgavest them, though thou tookest vengeance of their inventions. Because he loves the person, and hates only the sin; therefore he preserves the one, destroys only the other. This is all the fruit, to take away his sin. The covenant that is made with us in Christ is not a covenant made with works, but with persons; and therefore, though the works be often hateful, yet he goes on to love the persons; and that he may continue to love them, destroys out of them what he hates, but cutteth not them off. A member that is leprous or ulcerous, a man loves it as it is "his own flesh, "Eph 5:29, though he loathes the corruption and putrefaction that is in it; and therefore he doth not presently cut it off, but purgeth it daily, lays plasters to it to eat the corruption out: whereas a wart or even a wen that grows to a man's body, a man gets it cut off, for he doth not reckon it as his flesh. Thomas Goodwin.