Where our language suggests a body and there is none: there, we should like to say, is a spirit.

I Once wrote: "In mathematics process and result are equivalent."

The world is everything that is the case.

There can never be surprises in logic.

Don't ask what it means, but rather how it is used.

When you are philosophizing you have to descend into primeval chaos and feel at home there.

If life becomes hard to bear we think of a change in our circumstances. But the most important and effective change, a change in our own attitude, hardly even occurs to us, and the resolution to take such a step is very difficult for us.