Just be indipendent of the external world, so you don't have to fear for what's in it.

Logic takes care of itself; all we have to do is to look and see how it does it.

I am not interested in constructing a building, so much as in having a perspicuous view of the foundations of possible buildings.

Make sure that your religion is a matter between you and God only.

Everything that can be said, can be said clearly.

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?

It is so characteristic, that just when the mechanics of reproduction are so vastly improved, there are fewer and fewer people who know how the music should be played.