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?

The common behavior of mankind is the system of reference by means of which we interpret an unknown language.

It is an hypothesis that the sun will rise tomorrow: and this means that we do not know whether it will rise.

That which cannot be said must not be said. That which cannot be said, one must be silent thereof.

The sole remaining task for philosophy is the analysis of language.

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

If people did not sometimes do silly things, nothing intelligent would ever get done.