A philosophical problem has the form: I don't know my way about.

In the world everything is as it is and happens as it does happen. In it, there is no value, - and if there were, it would be of no value.

'Imagine a person whose memory could not retain what the word 'pain' meant-so that he constantly called different things by that name-but nevertheless used the word in a way fitting in with the usual symptoms and presuppositions of pain'-in short he uses it as we all do. Here I should like to say: a wheel that can be turned though nothing else moves with it, is not part of the mechanism.

What is left over if I subtract the fact that my arms goes up from the fact that I raise my arm?

If a person tells me he has been to the worst places I have no reason to judge him; but if he tells me it was his superior wisdom that enabled him to go there, then I know he is a fraud.

A new word is like a fresh seed sown on the ground of the discussion.

An honest religious thinker is like a tightrope walker. He almost looks as though he were walking on nothing but air. His support is the slenderest imaginable. And yet it really is possible to walk on it.