Because it hurts both the one receiving the evil as well as the one paying back the evil. It merely makes matters worse, as can be seen from vendettas and feuds that have lasted for years and years. That is why divine wisdom counsels: “An answer, when mild, turns away rage, but a word causing pain makes anger to come up.” Because another has made a mistake is no reason for us to make one, is it?

Prov. 15:1;