'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.

We must do away with all explanation, and description alone must take its place.

When one is frightened of the truth then it is never the whole truth that one has an inkling of.

You learned the concept 'pain' when you learned language.

If in life we are surrounded by death, so too in the health of our intellect by madness.

No one can think a thought for me in the way that no one can don my hat for me.

Propositions show what they say: tautologies and contradictions show that they say nothing.