Always write angry letters to your enemies. Never mail them.
Holding on to anger is like grasping a hot coal with the intent of throwing it at someone else; you are the one who gets burned.
Malice drinks one-half of its own poison.
Speak when you are angry and you will make the best speech you will ever regret.
Anger is a bad counselor.
When a man sends you an impudent letter, sit right down and give it back to him with interest ten times compounded, and then throw both letters in the wastebasket.
One should not lose one's temper unless one is certain of getting more and more angry to the end.
Do something that makes a difference - because, by God, there's a lot to make you angry.
It's practically impossible to look at a penguin and feel angry.
Malice drinks one-half of its own poison.