The patient man goes through a great and salutary purgatory when he grieves more over the malice of one who harms him than for his own injury; when he prays readily for his enemies and forgives offenses from his heart; when he does not hesitate to ask pardon of others; when he is more easily moved to pity than to anger; when he does frequent violence to himself and tries to bring the body into complete subjection to the spirit.
–Imitation of Christ, Thomas a Kempis