forgive

" when  a deep injury is done us, we never recover until we forgive". Alan Paton

Forgive: to stop feeling angry or resentful towards someone for an offense flaw or mistake 

what i think this quote means is that if you want to forgive it can heal you one way because that can give you a relief and know you did the right thing but if you hurt by someone really bad then you don't have to forgive them because they hurt so that means you don't have to forgive you can hold a grudge as long as want to hold it because you have the right to hold it against them.  so you don't have to forgive anyone but if you want to you can and it will be nice to the person  you forgive for what they had done.