False words are not only evil in themselves, but they infect the soul with evil.

When two friends are in the mood to chat, we have to go about it in a gentler and more dialectical way. By 'more dialectical,' I mean not only that we give real responses, but that we base our responses solely on what the interlocutor admits that he himself knows.

The wise man will want to be ever with him who is better than himself.

It is as expedient that a wicked man be punished as that a sick man be cured by a physician; for all chastisement is a kind of medicine.

I have hardly ever known a mathematician who was capable of reasoning.

Only the dead will know the end of the war.

All things will be produced in superior quantity and quality, and with greater ease, when each man works at a single occupation, in accordance with his natural gifts, and at the right moment, without meddling with anything else.