"We find nothing easier than being wise, patient, superior. We drip with the oil of forbearance and sympathy, we are absurdly just, we forgive everything. For that very reason we ought to discipline ourselves a little; for that very reason we ought to cultivate a little emotion, a little emotional vice, from time to time. It may be hard for us; and among ourselves we may perhaps laugh at the appearance we thus present. But what of that! We no longer have any other mode of self-overcoming available to us: this is our asceticism, our penance."

Source: Friedrich Nietzsche (1977). “The Portable Nietzsche”, p.329, Penguin