SVF I.148

Original — Ancient Greek

ὁ θαυμαζόμενος ὑπὸ τῶν Στωικῶν λόγος ὁ Ζήνωνος … ἔχει γὰρ ὧδε· “φωνὴ διὰ φάρυγγος χωρεῖ. εἰ δὲ ἦν ἀπὸ τοῦ ἐγκεφάλου χωροῦσα, οὐκ ἂν διὰ φάρυγγος ἐχώρει. ὅθεν δὲ λόγος, καὶ φωνὴ ἐκεῖθεν χωρεῖ. λόγος δὲ ἀπὸ διανοίας χωρεῖ. ὥστ᾽ οὐκ ἐν τῷ ἐγκεφάλῳ ἐστὶν ἡ διάνοια.”

StoicOs Translation

The argument of Zeno admired by the Stoics … runs thus: “Voice passes through the throat. If it passed from the brain, it would not pass through the throat. But whence speech (logos) comes, thence voice comes too. And speech comes from the understanding (dianoia). Therefore the understanding is not in the brain.”

Context

Galen, the great physician and philosopher, wrote a whole treatise to prove — with the anatomy of the nerves — that the ruling part of the soul sits in the brain. He quotes Zeno's celebrated argument for the chest as the canonical Stoic position he must demolish.

Source notes:Text verified against von Arnim, SVF I (1903), no. 148, p. 40 (OCR of the scanned edition). Galen introduces it as “the argument of Zeno admired by the Stoics” and quotes it in fixed form (“it runs thus”) in order to refute it at length. Von Arnim notes in the apparatus that the transmitted order of “logos” and “voice” need not be emended.

What the source actually tells us

A verbatim quotation of the school's canonical form of Zeno's argument, transmitted by a hostile witness who needed to reproduce it exactly in order to refute it — the strongest kind of adversarial evidence. Galen returns to the same wording repeatedly in the treatise.

Philosophical meaning

Where does thinking happen? Zeno answers with observation, not anatomy: meaningful speech and voice leave the body by the same road, the throat — so their common source must lie below the head, in the chest, where the Stoics located the hēgemonikon. The argument is wrong by modern lights, but it shows Zeno's method at its purest: a compressed chain of premisses drawn from everyday experience (cf. SVF I.137, I.229).

Scholarly uncertainty

Galen quotes the argument as the school preserved it four centuries after Zeno; whether every word is Zeno's own or a polished school-formula cannot be decided. Galen is an openly hostile witness, and the ellipsis before the quotation marks his interposed polemic, not lost Zenonian text.

Go deeper

• Read SVF I.141 — the ruling part receives the imprints →
• Read SVF I.137 — the soul is a body →