The memory of insults is the residue of anger. It keeps sins alive, hates justice, ruins virtue, poisons the heart, rots the mind, defeats concentration, paralyzes prayer, puts love at a distance, and is a nail driven into the soul. If anyone has appeased his anger, he has already suppressed the memory of insults, while as long as the mother is alive the son persists. In order to appease the anger, love is necessary.
— Saint John Climacus (c. 525-606)