Narcissists will try to take away your right to be angry yet being angry and showing emotion is exactly what a normal healthy relationship entails. As long as you cater to the narcs constant needs and demands all is good. But don't dare have an opinion, don't dare offer advice, never counteract or question his or her actions, and don't dare speak up and voice your concerns or else the narc rage will surface with a possibility of further abuse and isolation.
Quote: "Forgive others, not because they deserve forgiveness, but because you deserve peace." Lesson to learn: Being angry at someone hurts only you. Let go of your anger, not for the other person, but for yourself. Remember, forgiving doesn't mean forgetting. Forgiving means accepting that it happened.