You do not want to pressure Margie into forgiving. At the same time, you do not necessarily want to ignore your friend who could be better off psychologically by considering forgiveness. I recommend that you be aware of Margie’s inner pain. When she expresses that pain (as fatigue or bodily tensions or deep anger), you could focus on that pain and ask her if she has a way of reducing or eliminating that pain. If she has no effect strategies in mind, it is then that you might consider suggesting forgiving as a way to get rid of the pain. I have found that pain is a great motivator toward healing and forgiving is one path to that healing.