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Plotinus

Plotinus
RoomThinkers
Bornc. 204/5 CE, Lycopolis, Egypt
Died270 CE, Campania (c. 65)
SchoolNeoplatonism
Known forThe Three Hypostases, henosis
Key workThe Enneads (compiled by Porphyry)

Plotinus (c. 204/5–270 CE) — Founder of Neoplatonism

The most influential philosopher of Late Antiquity. Founded Neoplatonism, the dominant school of Greco-Roman philosophy from the 3rd to 6th centuries CE. His collected works, the Enneads (six groups of nine treatises), were compiled and arranged by his student Porphyry (~300 CE).

The Three Hypostases


Plotinus's metaphysics is structured around three levels of reality (hypostases):



      THE ONE (to Hen)
           — Absolutely simple, beyond being and thought
           — The source of all reality, cannot be named or described
           — Not a being — "beyond being"
           — Known only through union (henosis)
         ↓
      INTELLECT (Nous)
           — The second hypostasis
           — Contains all Forms/Ideas (Plato's Forms internalized)
           — Knower and Known are identical here
           — The realm of true Being
         ↓
      SOUL (Psyche)
           — The third hypostasis
           — Lower aspect: Nature, the physical world
           — Higher aspect: World Soul, individual souls
           — Mediates between Intellect and the material world
         ↓
      MATTER (Hyle)
            — The lowest level, privation of form
            — Source of evil (as absence of Good)

The One (to Hen)

The absolute first principle — utterly simple, beyond all predication, beyond being itself. Plato had hinted at this in the Parmenides. Plotinus radicalized it: the One is not a being among beings but the transcendent source from which everything flows. We cannot say what it IS — only what it is NOT (via negativa / apophaticism).


Emanation (Proodos)

Reality is produced through a necessary overflow from the One — not by choice or creation, but as light emanates from the sun. Each lower level is a diminished image of the higher. The process is eternal, not temporal.


Return (Epistrophe)

The soul's journey is to reverse the direction of emanation — to turn inward, ascend through Intellect, and eventually achieve union with the One. This is the philosophical life: purification, contemplation, henosis.


Life and Work

  • Born in Lycopolis, Egypt (c. 204/5 CE)
  • Studied in Alexandria under Ammonius Saccas (for 11 years)
  • Attempted to accompany Emperor Gordian III's Persian expedition to study Eastern philosophy (failed — Gordian assassinated)
  • Established his own school in Rome (244 CE) — taught for ~25 years
  • Prominent students: Porphyry (editor of the Enneads), Amelius
  • Described by Porphyry as "ashamed of being in the body" — ascetic, vegetarian, avoided physical remedies
  • Died in Campania, 270 CE

  • The Enneads — Structure


    EnneadSubjectKey treatises

    |--------|---------|--------------|

    IEthics, human lifeOn Virtue, On Beauty, On Happiness
    IINatural philosophyOn the Kosmos, On Matter, Against the Gnostics
    IIIProvidence, fate, loveOn Fate, On Providence, On Love, Time and Eternity
    IVSoulOn the Essence of the Soul, Problems of the Soul, Immortality
    VIntellect (Nous)On the Three Hypostases, On Intellect
    VIThe One, BeingOn the One, On Numbers, On Free Will

    Influence


  • Christianity: Augustine (Confessions VII — reading Plotinus freed him from materialism), Pseudo-Dionysius (apophatic theology), Thomas Aquinas (via Proclus)
  • Islamic philosophy: Al-Farabi, Avicenna, Suhrawardi (Illuminationism)
  • Jewish philosophy: Avicebron, Maimonides (via Islamic Neoplatonism)
  • Renaissance: Ficino (translated the Enneads into Latin, 1492), Pico della Mirandola, Michelangelo
  • Modern: Hegel (dialectic), Bergson (duration), Emerson (Over-Soul), Yeats (visionary poetry)

  • Key Sources

  • Stanford Encyclopedia of Philosophy (2024): Plotinus — comprehensive entry
  • Philopedia: Enneads — structured summary with section-by-section analysis
  • Internet Classics Archive: Full text of The Six Enneads (Mackenna/Page translation)
  • CCEL: Full PDF of The Six Enneads (Christian Classics Ethereal Library)
  • Sacred Texts Archive: Selected Ennead texts
  • Porphyry: Life of Plotinus (biographical source)
  • Springer: From Platonism to Neoplatonism (Merlan), Medieval Thought (Haren)

  • Tunnel Connections

  • Retroduction (Wheeler supplement) — Wheeler's Neoplatonist framing of retroduction draws directly from Plotinus (via negativa, apophaticism, henosis)
  • First Principles Thinking Thinking — Plotinus's One as the ultimate first principle (beyond being, beyond thought)
  • Posterior AnalyticsPosterior Analytics's archai vs Plotinus's One as the transcendent first principle
  • Dante Alighieri (research/thinkers) — Dante Alighieri's Paradiso (vision of God) is structurally parallel to Plotinus's henosis
  • Augustine (not yet filed) — directly converted by reading Plotinus

  • Connections

  • First Principles Thinking
  • Posterior Analytics
  • Retroduction
  • Dante Alighieri


  • See also

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