When an injustice happens, we want to be vindicated. People feel that if they forgive the person who hurt them, then they will continue to take advantage of them or not take responsibility for what they did wrong. If we're honest, we'll admit that we usually want the person who hurt us to pay for what they did. We can't get past this until we get the revelation that only God can pay us back. He is our Vindicator - He will heal and restore us if we will trust Him and forgive our enemies as He has told us to do.