Revenge is not the answer.

There are times when we feel that if you don't revenge, you'll not live peacefully.
Revenge is getting even with a person. There some people who love revenge so much and that every single wrong thing must be revenged.

A vengeful person can be dangerous at times. You don't know what he or she is planning to do to you.
Revenging will not solve anything, it will only increase problems.

If someone plans a revenge and kills someone, he will be arrested and spend the rest of his life in jail. That revenge has only increased problems and not otherwise.

You can revenge because of
*Something that happened in the past between two people.
*Not forgiving.
You should forgive and forget rather than living in the past which will only hurt you.

There some people who cannot back down from a fight. They must revenge of no matter how little the issue is.
When others get revenge, they are not satisfied in the heart. On the contrary, they feel bad and guilty with themselves.

It's because they know even if they revenge, nothing will change whatever happened in the past.
That is very true.
Nothing will change at all. Whatever happened, already happened. Everyone should remember that what's done cannot be undone.