SVF I.143

Original — Ancient Greek

Ζήνων δὲ ὁ Στωικὸς ὀκταμερῆ φησιν εἶναι τὴν ψυχήν, διαιρῶν αὐτὴν εἴς τε τὸ ἡγεμονικὸν καὶ εἰς τὰς πέντε αἰσθήσεις καὶ εἰς τὸ φωνητικὸν καὶ τὸ σπερματικόν.

StoicOs Translation

Zeno the Stoic says that the soul has eight parts, dividing it into the governing part, the five senses, the faculty of speech and the generative faculty.

Context

Nemesius, Christian bishop of Emesa around 400 CE, wrote a treatise on human nature that carefully reports the psychological doctrines of the Greek schools, often with school labels attached. He writes roughly six and a half centuries after Zeno, but his reports of Stoic psychology are generally regarded as well informed.

Source notes:Text verified against H. von Arnim, SVF I (1903), no. 143, p. 39 (scanned page). Under the same number von Arnim prints the parallel from Iamblichus' On the Soul (ap. Stobaeus, Ecl. I 49,34): “the followers of Zeno hold the soul to have eight parts”, noting that Iamblichus' further wording is corrupt.

What the source actually tells us

A testimonium in Nemesius' own words, explicitly naming Zeno. It attests the eightfold division of the soul: one commanding centre (hēgemonikon), the five senses, voice and the generative power. The Iamblichus parallel attributes the same doctrine to “the followers of Zeno”, suggesting it was school property; whether the enumeration in exactly this form goes back to Zeno himself cannot be verified from these witnesses.

Philosophical meaning

The striking point is the architecture: seven faculties radiating from one commanding centre. Seeing, hearing, speaking, begetting — all are extensions of the hēgemonikon, the governing part, like the arms of an octopus around its head, as later Stoics put it. Everything the Stoics say about emotion, judgment and self-command presupposes this map: there is one centre in you where impressions arrive and where assent is given or refused.

Scholarly uncertainty

The eightfold soul is elsewhere attributed to the Stoa in general or to Chrysippus; Nemesius' explicit attribution to Zeno is valuable but isolated, and Tertullian (fr. 144) even reports a threefold division for Zeno. The Iamblichus parallel is textually corrupt at the decisive point. The attribution of the exact scheme to Zeno personally therefore remains open.

Go deeper

• Read SVF I.135 — the soul as warm breath →
• Train it: Stoic Training Part 2 — Emotions →