"Anger is just anger. It isn't good. It isn't bad. It just is. It's what you do with it that matters. It's like anything else. You can use it to build or destroy. You just have to make the choice.

Constructive anger, also known as passion. Passion has overthrown tyrants and freed slaves. Passion has brought justice where there is savagery. Passion has created freedom when there is nothing but fear. Passion has helped souls rise from the ashes of their lives and build something Better, stronger, and more beautiful. Anger can help build if it's properly controlled."

-Partially paraphrased quote from the Dresden Files.

But this is something that I wholeheartedly believe.