Logic

Tractatus Logico-Philosophicus

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Ludwig Wittgenstein

1921

Wittgenstein's first masterwork proposes that language is a logical picture of reality: the world consists of facts, propositions are pictures of those facts, and the limits of meaningful language are the limits of the world. Everything else — ethics, aesthetics, the mystical — can only be shown, never said. The book ends with its most famous sentence: "Whereof one cannot speak, thereof one must be silent."