Whether vengeance is lawful?

Objections

Objection 1 : It seems that vengeance is not lawful. For whoever usurps what is God's sins. But vengeance belongs to God, for it is written (Dt. 32:35, Rm. 12:19): "Revenge to Me, and I will repay." Therefore all vengeance is unlawful.
Objection 2 : Further, he that takes vengeance on a man does not bear with him. But we ought to bear with the wicked, for a gloss on Cant 2:2, "As the lily among the thorns," says: "He is not a good man that cannot bear with a wicked one." Therefore we should not take vengeance on the wicked.
Objection 3 : Further, vengeance is taken by inflicting punishment, which is the cause of servile fear. But the New Law is not a law of fear, but of love, as Augustine states (Contra Adamant. xvii). Therefore at least in the New Testament all vengeance is unlawful.
Objection 4 : Further, a man is said to avenge himself when he takes revenge for wrongs inflicted on himself. But, seemingly, it is unlawful even for a judge to punish those who have wronged him: for Chrysostom [*Cf. Opus Imperfectum, Hom. v in Matth., falsely ascribed to St. Chrysostom] says: "Let us learn after Christ's example to bear our own wrongs with magnanimity, yet not to suffer God's wrongs, not even by listening to them." Therefore vengeance seems to be unlawful.
Objection 5 : Further, the sin of a multitude is more harmful than the sin of only one: for it is written (Ecclus. 26:5-7): "Of three things my heart hath been afraid . . . the accusation of a city, and the gathering together of the people, and a false calumny." But vengeance should not be taken on the sin of a multitude, for a gloss on Mt. 13:29,30, "Lest perhaps . . . you root up the wheat . . . suffer both to grow," says that "a multitude should not be excommunicated, nor should the sovereign." Neither therefore is any other vengeance lawful.