Don't believe a teaching just because you've heard it from a man who's supposed to be holy, or because it's contained in a book supposed to be holy, or because all your friends and neighbors believe it. But whatever you've observed and analyzed for yourself and found to be reasonable and good, then accept that and put it into practice.
Rage is a powerful energy that with diligent practice can be transformed into fierce compassion. However much we disagree with our enemies, our task is to identify with them. They too feel justified in their point of view.
Freed by full realization and at peace, the mind of such a man is at peace, and his speech and action peaceful. He has no need for faith who knows the uncreated, who has cut off rebirth, who has destroyed any opportunity for good or evil, and cast away all desire. He is indeed the ultimate man.