Stanford Encyclopedia of Philosophy
For a large class of cases — though not for all — in which we employ the word meaning it can be explained thus: the meaning of a word is its use in the language.
Uttering a word is like striking a note on the keyboard of the imagination.
So in the end when one is doing philosophy one gets to the point where one would like just to emit an inarticulate sound.
The world is the totality of facts, not things.
The whole sense of the book might be summed up the following words: what can be said at all can be said clearly, and what we cannot talk about we must pass over in silence.