人我に辛ければ我また人に辛し
Meanings
1
treat others as they treat you; an eye for an eye
Proverb meaning that if someone is harsh to you, you will be harsh in return. It expresses a reciprocal, tit-for-tat attitude. The phrasing is classical and literary.
The idea of 'treat others as they treat you' can sometimes create a chain of resentment.