“Thus, I blush to add, you can not be a philosopher and a good man, though you may be a philosopher and a great one.”

“So now you must choose... Are you a child who has not yet become world-weary? Or are you a philosopher who will vow never to become so? To children, the world and everything in it is new, something that gives rise to astonishment. It is not like that for adults. Most adults accept the world as a matter of course. This is precisely where philosophers are a notable exception. A philosopher never gets quite used to the world. To him or her, the world continues to seem a bit unreasonable - bewildering, even enigmatic. Philosophers and small children thus have an important faculty in common. The only thing we require to be good philosophers is the faculty of wonder…”

“There is only one thing a philosopher can be relied upon to do, and that is to contradict other philosophers.”

“Philosophize: you are a mistress, part of a great hysterical you mean historical tradition.”

“No man was ever yet a great poet, without at the same time being a profound philosopher.”

“Every good mathematician is at least half a philosopher, and every good philosopher is at least half a mathematician.”