The recollection of an injury is itself wrong. It adds to our anger, nurtures our sin, and hates what is good. It is a rusty arrow and poison for the soul. It puts all virtue to flight. It is like a worm in the mind: it confuses our speech and tears to shreds our petitions to God. It is foreign to charity: it remains planted in the soul like a nail. It is wickedness that never sleeps, sin that never fails. It is indeed a daily death.
–Saint Francis of Paola (1416-1507)