From the shamanic perspective when we can't forgive someone, we are stealing part of his or her soul. It is as though we hold on to a part of their essence. The tricky part about this is that we cannot force ourselves to forgive someone. Forgiveness is something that happens; it is not something we do. But we can set our intention to finding a way for forgiveness to happen so that both parties are set free from each other. As we put our attention to the task, we create an energy where forgiveness can slowly begin to happen.
Reference~ Awakening To The Spirit World, Sandra Ingerman
Reference~ Awakening To The Spirit World, Sandra Ingerman