Some Ans. Questions 2014 by -'Abdu'l-Bahá- 1 Para

Now, vengeance is reprehensible even according to reason, for it is of no benefit to the avenger. If a man strikes another, and the victim chooses to exact revenge by returning the blow, what advantage will he gain? Will this be a balm to his wound or a remedy for his pain? No, God forbid! In truth the two actions are the same: Both are injuries; the only difference is that one preceded the other. Therefore, if the victim forgives, or better still, if he acts in the opposite manner, this is praiseworthy (76:5)

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