Revenge will hurt the avenger.
跳蚤和人
The Flea and the Man
跳蚤在一个人的身上疯狂地叮咬，那人费了好大劲才捉住了跳蚤，对他说：“你竟敢如此胆大妄为，在我的身上胡乱叮咬！”跳蚤用很无辜的语气回答道：“亲爱的先生，请你饶恕我的罪恶吧！我并没有做什么伤天害理的事情啊！”那人听了，哈哈大笑，对他说：“你落在我的手里是死定了。因为我是不会容忍任何罪恶的。”
对于恶不可有丝毫容忍。
A Man，very much annoyed with a Flea，caught him at last，and said，“Who are you who dare to feed on my limbs，and to cost me so much trouble in catching you？” The Flea replied，“Oh my dear sir，pray spare my life，and destroy me not，for I cannot possibly do you much harm.” The Man，laughing，replied，“Now you shall certainly die by mine own hands，for no evil，whether it be small or large，ought to be tolerated.”