以眼还眼，以牙还牙

以眼还眼，以牙还牙:

Literally means:

an eye for an eye and a tooth for a tooth

Actually means:

This phrase means retaliating upon others the same as was treated by others.

It often means waging a tit-for-tat fight against the enemies, especially the invaders or the persecutors. (This is directly quoted from the Bible).

比喻用对方对待自己的手段还击对方。

常用于表示跟敌人，特别是侵略者或迫害过自己的人进行针锋相对的斗争。