The book which most deserved to be banned would be a catalog of banned books.

I made the journey to knowledge like dogs who go for walks with their masters, a hundred times forward and backward over the same territory; and when I arrived I was tired.

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.

God: personified incomprehensibility.

Everyone should study at least enough philosophy and belles-lettres to make his sexual experience more delectable.

A man of spirit must not think of the word difficulty as so much as existing. Away with it!

Never undertake anything unless you have the heart to ask Heaven's blessing on your undertaking.