The Catechism on anger (2302):
Anger is a desire for revenge. "To desire vengeance in order to do evil to someone who should be punished is illicit," but it is praiseworthy to impose restitution "to correct vices and maintain justice." If anger reaches the point of a deliberate desire to kill or seriously wound a neighbor, it is gravely against charity; it is a mortal sin. The Lord says, "Everyone who is angry with his brother shall be liable to judgment."
“The means of overcoming anger are:
1.) Forestall such feelings as much as possible, or at least banish them at once by thinking of something else.
2.) In imitation of the Apostles when the storm arose on the sea, have recourse to God, Who will restore peace to your heart.
3.) While you are boiling, do not talk or offer any opposition concerning the point in question.
4.) Strive to be humble and courteous towards the person with whom you feel angry, especially if he has shown resentment in any way.” St. Francis de Sales
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“Since it is impossible for us to go through life without causing annoyance to one another, it is necessary to have a great supply of meekness from which to draw to check sudden bursts of anger and preserve peace of soul.” St. Francis de Sales
“Let us strive to be kind, meek, and humble with everyone, but especially so with those whom God has destined to be our companions. Let us not be one of those who are angels in public and devils at home.” St. Francis de Sales
