Anger is a great force which, if controlled, can transmute one into a power, which can move the whole world.
Anger is a bitterness that devours your soul whereas righteous indignation is morally driven, it's ethically driven.
Anger is a beautiful emotion, as valid and rich as joy or laughter, whereby the key is how to express it and enjoy it without throwing it on someone else.
Anger is a form of recognition. It amounts to admitting that those people are important to you and that they have the power to hurt you. Actually, they haven't.
Anger is a fuel which, without any complex internal mechanism directing it, you do not have a rocket, but a bomb.
Anger is a choice, as well as a habit. It is a learned reaction to frustration in which one behaves in ways that one would rather not.