I think one of the things you and I have to learn is that we have to live without the consolation of belonging to a Church.... Of one thing I am certain. The religion of the future will have to be extremely ascetic, and by that I don't mean just going without food and drink.

A wheel that can be turned though nothing else moves with it, is not a part of the mechanism.

Talent is a spring from which fresh water always flows.- But this spring is worthless if no good use is made of it.

Telling someone something he does not understand is pointless, even if you add that he will not be able to understand it.

It is not humanly possible to gather immediately from it what the logic of language is. Language disguises thought.

Logic is not a body of doctrine, but a mirror-image of the world. Logic is transcendental.

Philosophy is not a theory but an activity.