Alas...I too have known love, that ruler of hearts, that soul of our soul: it's never brought me anything except one kiss and twenty kicks in the rump. How could such a beautiful cause produce such an abominable effect on you?

Constant happiness is the philosopher's stone of the soul.

An infallible method of making fanatics is to persuade before you instruct.

The more you know, the less sure you are.

A witty saying proves nothing, but saying something pointless gets people's attention.

What! Have you no monks to teach, to dispute, to govern, to intrigue and to burn people who do not agree with them?

All the known world, excepting only savage nations, is governed by books.