As weapons rebound from a hard surface, and solid substances hurt those who strike them, so also no insult can make a really great mind sensible of its presence, being weaker than that against which it is aimed. How far more glorious is it to throw back all wrongs and insults from oneself, like one wearing armour of proof against all weapons, for revenge is an admission that we have been hurt. That cannot be a great mind which is disturbed by injury.