Zeno of Citium
On Substance
Written work
On Substance
Περὶ οὐσίας

A lost physics treatise cited by Diogenes Laertius (VII 134) as the source of the doctrine of the two principles of the universe: a passive one, unqualified matter, and an active one, reason or god, which, eternal, pervades it and shapes each thing. It is the basis of Stoic physics.
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Authorship note
A lost work, not included in the list at VII 4; known from Diogenes Laertius' citation (VII 134).
Editions and translations
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Other works by Zeno of Citium
- Republic (Politeia) · 310
- On Impulse, or On Human Nature
- Fragments and testimonies · 1905
- On Life according to Nature
- On the Passions
- On the Appropriate (Duty)
- On Law
- On Greek Education
- On Vision
- On the Whole (the Universe)
- On Signs
- Pythagorean Questions
- Universals (General Questions)
- On Diction
- Homeric Problems (5 books)
- On Listening to Poetry
- Art (Handbook of Rhetoric)
- Solutions
- Refutations (2 books)
- Memoirs of Crates
- Ethics
- On Reason (Discourse)
- On the Soul
- Art of Love
- Diatribes (Interludes)
- Chreiai (Anecdotes)
- Letter to King Antigonus · 276
Sources
- Diógenes Laercio. Vidas y opiniones de los filósofos ilustres, libro VII, 1–160 (Zenón y la doctrina estoica), s. III d. C. Trad. inglesa de R. D. Hicks, Loeb Classical Library 185, 1925 (Wikisource en inglés); texto griego en Wikisource griega; trad. de C. D. Yonge, Bohn, 1853 (Project Gutenberg n.º 57342).
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