How one can say that justice prevails? Is it when one get their deserved punishment, and how are we going to scale what 'deserved' should mean. An equivalent punishment, or how.

I suddenly remembered my initial reason why 'law' , because I believe an eye should be for an eye. But as time goes by, so many things happened in my life that made me think twice, thrice should an eye really be for an eye in return.

I wonder.