The practice of Humility - 20

Anger is a despicable vice; it should not be allowed in anyone, especially in persons with interior life.  Anger takes its roots and derives its violence from pride.  Exert effort, therefore, to build up a reservoir of sweetness; thus, even if someone offends you, you will be able to keep calm.  In these cases, do not harbor or kindle in your heart sentiments of aversion or revenge against your offender; forgive him wholeheartedly; be convinced that you could have no better chance than this to obtain forgiveness from God for having offended Him.  This humble endurance will earn you merit for heaven.

J. Pecci (later Pope Leo XIII)