Holding onto a grudge means that we have made a decision to continue our own suffering. We have provided a safe harbor for our misery, grief, pain and anger. Resentment and bitterness will keep the grudge safe so that it can work its power on our hearts. The poison in our system can affect everyone us. It creates an atmosphere that touches everyone around us, from the youngest to the eldest. Only when you relinquish the pain can you start to live again.
(from Radical Perceptions)