Buddhism says that each of our emotions have two sides- positive and negative. While one can’t anything about having emotions and one has to live with them, one can change our reaction and outcome for each emotion. So for example, tranquility can be seen as a positive thing but taken too far, it can make us seem too complacent to be bothered about anything. So as long as we are happy in our little world, we are not concerned about the rest of the humanity. On the other hand, anger is seen as a negative emotion. But it can be a force for good too. It can be justice, it can be a strong concern to change something in ourselves and others.
I mostly live in the world of tranquility- happy to live and let live. But because of this attitude, I have been taken for a ride, people have cheated me and I have been hurt. It takes me a long time to be angry but I have noticed that when I am angry, I get things done. Recently a second hand shop sold me a radio which was defective. I took it back three times and each time the shopkeeper said that it would work after I tuned in at home. This has turned out to be false. The man also spoke to me in a patronising way. So last week, I got really angry- angry at both the man and at myself. But keeping anger bottled up is also negative, so I used that energy to research and get myself a nice radio. I needed to respect myself. No more going back to that shop and I am now back to my world of tranquility again. But I realised that it is good to get angry (but not destructively) once in awhile and get things done!