If an angel were to tell us about his philosophy, I believe many of his statements might well sound like '2 x 2= 13'.

Whenever he composes a critical review, I have been told, he gets an enormous erection.

Deliberate virtue is never worth much: The virtue of feeling or habit is the thing.

Imagine the world so greatly magnified that particles of light look like twenty-four-pound cannon balls.

I ceased in the year 1764 to believe that one can convince one’s opponents with arguments printed in books. It is not to do that, therefore, that I have taken up my pen, but merely so as to annoy them, and to bestow strength and courage on those on our own side, and to make it known to the others that they have not convinced us.

To write brashly about some things, it is almost necessary not to know much about them.

We have no words for speaking of wisdom to the stupid. He who understands the wise is wise already.