Almost in the same way as earlier physicists are said to have found suddenly that they had too little mathematical understanding to be able to master physics; we may say that young people today are suddenly in the position that ordinary common sense no longer suffices to meet the strange demands life makes. Everything has become so intricate that for its mastery an exceptional degree of understanding is required. For it is not enough any longer to be able to play the game well; but the question is again and again: what sort of game is to be played now anyway?

We find certains things about seeing puzzling, because we do not find the whole business of seeing puzzling enough.

Every sign by itself seems dead. What gives it life?--In use it is alive. Is life breathed into it there?--Or is the use its life?

You can't think decently if you're not willing to hurt yourself

Believers who have formulated such proofs [for God's existence] ... would never have come to believe as a result of such proofs

Talent is a spring from which fresh water always flows.- But this spring is worthless if no good use is made of it.

A propositional sign, applied and thought out, is a thought. A thought is a proposition with a sense.