"The problems arising through a misinterpretation of our forms of language have the character of depth. They are deep disquietudes; their roots are as deep in us as the forms of our language and their …"

"What is essential is that the picture of the world in which the problem is embedded should change."

"Not to understand a grammar is to be unable to understand an idiom."

"The true method of philosophy is to say nothing except what can be said, i.e. propositions of natural science."

"It is not a matter of teaching the student of philosophy new facts, but of teaching him new ways of looking at old facts."