Whereof One Cannot Speak

The Quote

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

— Ludwig Wittgenstein, Tractatus Logico-Philosophicus, Proposition 7

Original language: German (Wovon man nicht sprechen kann, darüber muss man schweigen.)

Historical Context

Proposition 7 is the last of the seven main propositions of the Tractatus Logico-Philosophicus, the only philosophical book Wittgenstein published in his lifetime. The work is organized as a hierarchy of numbered propositions, with the most general at the top and the most specific as sub-propositions. Proposition 7, standing alone at the end, functions as the conclusion of the entire system.

The Tractatus argues that language pictures reality. A meaningful proposition shares a logical form with the fact it represents, and it is by virtue of this shared form that the proposition can be true or false. But this account has a striking consequence: the logical form itself — the structure that makes language possible — cannot be expressed in language. You cannot stand outside language to describe how language relates to the world, because any such description would itself be a use of language. The Stanford Encyclopedia of Philosophy notes that Wittgenstein called this the fundamental idea of the Tractatus: that what can be said can only be said in propositions of natural science, and that everything else — ethics, aesthetics, the meaning of life — belongs to the mystical and cannot be said.

Meaning

Proposition 7 draws the line between the sayable and the unsayable. On one side are the propositions of natural science, which picture facts about the world and can be true or false. On the other side are ethics, aesthetics, and the question of life's meaning — things that cannot be stated as factual propositions but that Wittgenstein regarded as the most important things in life. He wrote in a letter to his publisher that the Tractatus consists of two parts: the propositions it contains, and all the ones it does not contain, and that the second part is the important one.

The proposition is not a counsel of despair. It is a delineation of boundaries. By marking what cannot be said, Wittgenstein protects the unsayable from the confusions of bad metaphysics — the attempt to state as factual propositions what can only be shown. The silence that proposition 7 commands is not the silence of ignorance but the silence of respect for what exceeds the reach of language.

Philosophical Interpretation

Proposition 7 has generated more interpretive debate than almost any other single sentence in twentieth-century philosophy. The logical positivists read it as a verificationist principle: meaningful propositions are those that can be empirically verified, and everything else is nonsense. Wittgenstein himself rejected this reading. In his 1929 "Lecture on Ethics," he described the attempt to express the ethical as a running against the walls of language — a futile but deeply human impulse that reveals the value of what cannot be said.

The corollary that ethics cannot be expressed in propositions has had lasting influence. The Internet Encyclopedia notes that the distinction between saying and showing — between what can be stated as a fact and what can only be exhibited in the structure of language or practice — has shaped the philosophy of language, the philosophy of mind, and meta-ethics. Proposition 7 is the most famous expression of the Tractarian view that the most important things in life are not the ones we can talk about but the ones that show themselves in how we live.

Related Learning

• Explore the Wittgenstein thinker page for his broader philosophical project, including the later philosophy of language games.
• The epistemology philosophy page situates the Tractatus within the broader study of knowledge and its limits.
• The Stanford Encyclopedia entry on Ludwig Wittgenstein provides scholarly context for the Tractatus and proposition 7.

Sources

1. Wittgenstein, Ludwig. Tractatus Logico-Philosophicus. Translated by D.F. Pears and B.F. McGuinness. London: Routledge, 1961. Proposition 7.
2. Stanford Encyclopedia of Philosophy, "Ludwig Wittgenstein." https://plato.stanford.edu/entries/wittgenstein/