OSHO

Anger
Anger is natural, because you have not created it; you are born with it, endowed by nature. And nature must have some use for it, otherwise it cannot be given to you. But the society is against it; it says suppress it. And when you suppress anger, many more things are suppressed by it, because everything is interrelated in your inner being. You cannot suppress one thing; you cannot express one thing. You express one, millions are expressed; you suppress one, millions are suppressed.
- Until You Die, Chapter #3

Anger is just a mental vomit. Something is wrong that you have taken in and your whole psychic being wants to throw it out, but there is no need to throw it out on somebody. Because people throw it on others, society tells them to control it.
There is no need to throw anger on anybody. You can go to your bathroom, you can go on a long walk -- it means that something is inside that needs fast activity so that it is released. Just do a little jogging and you will feel it is released, or take a pillow and beat the pillow, fight with the pillow, and bite the pillow until your hands and teeth are relaxed. Within a five-minute catharsis you will feel unburdened, and once you know this you will never throw it on anybody, because that is absolutely foolish.
- And the Flowers Showered, Chapter#3

Somebody insults you, anger arises; you remain a witness. The insult comes from outside, the anger arises on the periphery, and you remain at the center, watching. Yes, somebody has done something, provoked your periphery, and there is anger on the periphery, and the anger is surrounding you like a smoke cloud, but you are at the hub, watching. You are not identified with the periphery. Then the insult is outside, and the anger is also outside of you. Both are separate and far away. Both are different from you
- The Beloved, Vol 1, Chapter #3

Whenever anger seizes us, our attention is focused on the man who has caused it. In that case, it is difficult to step out of anger. When anyone brings about anger in you, forget him immediately and concentrate on him to whom anger is happening. Remember, no amount of concentration brings any change in the adversary. If any change is to be brought about, it can only be in the one who is angry.
- The Way of Tao, Volume 1, Chapter #5