Ludwig Wittgenstein (April 26, 1889 – April 29, 1951)

The world consists of independent atomic facts — existing states of affairs — out of which larger facts are built.
Language consists of atomic, and then larger-scale propositions that correspond to these facts by sharing the same "logical form."
Thought, expressed in language, "pictures" these facts.
We can analyse our thoughts and sentences to express ('express' as in show, not say) their true logical form.
Those we cannot so analyse cannot be meaningfully discussed.
Philosophy consists of no more than this form of analysis: "Wovon man nicht sprechen kann, darüber muß man schweigen" — whereof one cannot speak, thereof one must be silent.