# Quote — Ludwig Wittgenstein, Tractatus Logico-Philosophicus

> Whereof one cannot speak, thereof one must be silent.

- Author: [Ludwig Wittgenstein](https://www.leafyquotes.com/ludwig-wittgenstein.md)
- Book: [Tractatus Logico-Philosophicus](https://www.leafyquotes.com/ludwig-wittgenstein/tractatus-logico-philosophicus.md)
- Original (de): Wovon man nicht sprechen kann, darüber muss man schweigen.
- Source: [Wikiquote](https://en.wikiquote.org/wiki/Ludwig_Wittgenstein#Tractatus_Logico-Philosophicus_(1922)) ([CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/))
- Quote page: https://www.leafyquotes.com/ludwig-wittgenstein/tractatus-logico-philosophicus/whereof-one-cannot

## More from this book

> If I cannot say a priori what elementary propositions there are, then the attempt to do so must lead to obvious nonsense.

[Quote page](https://www.leafyquotes.com/ludwig-wittgenstein/tractatus-logico-philosophicus/if-i-cannot.md)

> A tautology's truth is certain, a 's possible, a contradiction's impossible. (Certain, possible, impossible: here we have the first indication of the scale that we need in the theory of probability.)

[Quote page](https://www.leafyquotes.com/ludwig-wittgenstein/tractatus-logico-philosophicus/a-tautologys-truth.md)

> The world and life are one.

[Quote page](https://www.leafyquotes.com/ludwig-wittgenstein/tractatus-logico-philosophicus/the-world-and.md)