Remembrance of wrongs is the consummation of anger, the keeper of sins, hatred of righteousness, ruin of virtues, poison of the soul, worm of the mind, shame of prayer, stopping of supplication, estrangement of love, a nail stuck in the soul, pleasureless feeling beloved in the sweetness of bitterness, continuous sin, unsleeping transgression, hourly malice.
This dark and hateful passion, I mean remembrance of wrongs, is one of those that are produced but have no offspring. That is why we do not intend to say much about it.
He who has put a stop to anger has also destroyed remembrance of wrongs; because childbirth continues only while the father is alive.
+ St. John Climacus, Ladder of Divine Ascent, Step 9.2-4