As soon as you know a man to be blind, you imagine that you can see it from his back.

Even truth needs to be clad in new garments if it is to appeal to a new age.

If you are going to build something in the air it is always better to build castles than houses of cards.

Great men too make mistakes, and many among them do it so often that one is almost tempted to call them little men.

The sure conviction that we could if we wanted to is the reason so many good minds are idle.

When a book and a head collide and a hollow sound is heard, must it always have come from the book?

Diogenes, filthily attired, paced across the splendid carpets in Plato's dwelling. Thus, said he, do I trample on the pride of Plato. Yes, Plato replied, but only with another kind of pride.