Remembrance of wrongs is consummation of anger, the keeper of sin, hatred of righteousness, ruin of virtues, poison of the soul, worm of the mind, shame of prayer…you will know that you have completely freed yourself of this rot, not when you pray for the person who has offended you, not when you exchange presents with him, not when you invite him to your table, but only when, on hearing that he has fallen into bodily or spiritual misfortune, you suffer and weep for him as for yourself. (St. John Climacus, The Ladder of Divine Ascent)
“But I say to you,” the Lord says, “love your enemies, do good to those who hate you, pray for those who persecute you.” Why did he command these things? So that he might free you from hatred, sadness, anger and grudges, and might grant you the greatest possession of all, perfect love, which is impossible to possess except by the one who loves all equally in imitation of God. (St. Maximus the Confessor)
(from In Communion, Issue 42: Summer 2006)