I encourage people not to express their anger, not to let it out. Instead, I have people try to understand why they get angry, what causes it and how it arises. When you realize these things, instead of manifesting externally, your anger digests itself. In the West, some people believe that you get rid of your anger by expressing it, that you finish it by letting it out. Actually, in this case what happens is that you leave an imprint in your mind to get angry again.
–Lama Thubten Yeshe