It's refreshing to hear this positive take on anger. I feel strongly that anger can be an awesome force when it is used to get fired about something and use that power by channeling it into passion. For me anger is often frustration with myself, so when I transform this into passion, it really becomes something far more incredible than had I not got angry in the first place. This happened to me about a month ago, before I was teaching Kundalini Dance something triggered me quite strongly, and then during the session, I really was on fire, and reached a whole new level for myself, and the whole crowd!
RE: How Much Anger is 'Normal'? The Role of Anger in Evolution And Maintaining Free Will / Balance.