Genuine remorse is certainly extremely rare among wrong-doers and the victims of punishment; prisons and houses of correction are not the soil on which this worm of remorse pullulates for choice—this is the unanimous opinion of all conscientious observers, who in many cases arrive at such a judgment with enough reluctance and against their own personal wishes.
— from The Genealogy of Morals The Complete Works, Volume Thirteen, edited by Dr. Oscar Levy. by Friedrich Wilhelm Nietzsche