To understand a sentence means to understand a language. To understand a language means to be master of a technique.

If we were to imagine an orange on the blue side or green on the red side or violet on the yellow side, it would give us the same impression as a north wind coming from the southwest.

Philosophy is a battle against the bewitchment of our intelligence by means of language.

One often makes a remark and only later sees how true it is.

I'm doing philosophy like an old woman, first I'm looking for my pencil, then I'm looking for my glasses, then I'm looking for my pencil again.

Man has to awaken to wonder - and so perhaps do peoples. Science is a way of sending him to sleep again.

A tautology's truth is certain, a proposition's possible, a contradiction's impossible.