Everyone calls barbarity what he is not accustomed to.

I quote others in order to better express myself.

Each person calls barbarism whatever is not his or her own practice.... We may call Cannibals barbarians, in respect to the rulesof reason, but not in respect to ourselves, who surpass them in every kind of barbarity.

It is far more probable that our senses should deceive us, than that an old woman should be carried up a chimney on a broom stick; and that it is far less astonishing that witnesses should lie, than that witches should perform the acts that were alleged.

I care not so much what I am to others as what I am to myself. I will be rich by myself, and not by borrowing.

One may be humble out of pride.

As for our pupils talk, let his virtue and his sense of right and wrong shine through it and have no guide but reason. Make him understand that confessing an error which he discovers in his own argument even when he alone has noticed it is an act of justice and integrity, which are the main qualities he pursues; stubbornness and rancour are vulgar qualities, visible in common souls whereas to think again, to change one's mind and to give up a bad case on the heat of the argument are rare qualities showing strength and wisdom.