Socrates considered that to delude oneself that one
possesses a virtue one does not possess is an illness bordering on
madness: and such a delusion is certainly more dangerous than the
opposite illusion of being the victim of a fault or a vice. For in the latter
case it is at any rate possible one will become better; the former delusion, however, makes a man or an age daily worse – which in the
present instance means more unjust.
Nietzsche, On the Advantage and Disadvantage of History for Life §6
Nietzsche, On the Advantage and Disadvantage of History for Life §6