Excerpts from the writings of Paramahansa Yogananda
Absence of wrath is the quickest way to peace of mind. Anger is caused by the obstruction of one's desires....One who does not expect anything from others but who looks to God for all fulfillments cannot feel wrath toward his fellow men or disappointment in them. A sage is content in the knowledge that the Lord is running the universe....He is free from rage, animosity, and resentment.
Anger defeats the very purpose for which it is aroused. Anger is not an antidote for anger. A strong wrath may cause another to suppress his weaker wrath, but it will never kill that weaker wrath. When you are angry, say nothing. Knowing it is a disease, like the coming of a cold, break it up by mental warm baths consisting of thinking of those with whom you can never be angry, no matter how they behave. If your emotion is too violent, take a cold shower, or put a piece of ice on the medulla oblongata and the temples just above the ears, and on the forehead, especially between the eyebrows, and on the top of the head.
Anger gives birth to jealousy, hatred, spite, revengefulness, destructive instinct, wild ideas, brain paralysis, and temporary insanity — any of which may lead to terrible crimes. It is poison to peace and calmness. It is poison to understanding. Anger is a manner of misunderstanding. To conquer others by anger is the method of fools, for anger only rouses more wrath in the enemy and thus makes him a stronger and more powerful opponent. A righteous demonstration of anger to avert evil without causing harm is sometimes productive of good. Blind, uncontrolled anger is revengeful, spiteful; it only increases the evil that you wish to destroy. Be indifferent to those who seem to enjoy making you angry.
When anger comes, set your machinery of calmness in motion to manufacture the antidotes of peace, love, and forgiveness which banish anger. Think of love, and reflect that even as you do not want others to be angry with you, neither do you wish others to feel your ugly anger. When you become Christ-like and look upon all humanity as little brothers hurting one another ("for they know not what they do"), you cannot feel angry with anyone. Ignorance is the mother of all anger.
Develop metaphysical reason and destroy anger. Look upon the anger-arousing agent as a child of God; think of him as a little five-year-old baby brother who perhaps has unwittingly stabbed you. You should not feel a desire to stab this little brother in return. Mentally destroy anger by saying: I will not poison my peace with anger; I will not disturb my habitual joy-giving calmness with wrath."
Bless me, that I heal anger hurts in myself with the salve of self-respect, and anger hurts in others with the balsam of kindness."