The Enneads

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A dying man, blind and ulcerated, dictated his last sentence on an estate in Campania in the year 270, and a friend far away in Sicily would spend the rest of his own life deciding what order the dead man’s papers should go in. The papers were essays — fifty-four of them, written over some sixteen years, undated, mostly untitled, in a cramped and self-interrupting Greek their author never reread because his sight had failed. They had been composed as questions came up in a teaching circle, not as a book, and they doubled back on one another, restated, contradicted in emphasis. The friend was Porphyry of Tyre. What he made of those papers is the text the world reads as a single work, and the shape he gave it — six groups of nine, the ennea, the nine of the Greek — is the shape in which the founding architecture of Neoplatonism reached every reader who came after.

How the text was made

Plotinus, born in Roman Egypt about 204 or 205 and settled at Rome from around 244, wrote nothing for the first ten years he taught. When he began, in the first year of the emperor Gallienus, he wrote in response to the conferences — to a difficulty raised, a position challenged. He did not revise. His handwriting was poor, his spelling careless, and once a thing was set down he left it, since rereading was beyond him. The result was a body of occasional pieces of wildly uneven length, from a few pages to small books, and of uneven force: the disciple who edited them judged that the earliest were slighter, the middle ones the strongest, the last written when the mental strength was already waning.

That disciple, Porphyry, had arrived in the circle in the tenth year of Gallienus’s reign, at thirty, when Plotinus was about fifty-nine. He stayed close for years, was sent away once for melancholy, and was charged by the master, during his lifetime, with the revision and arrangement of the writings. It is a task Porphyry says he pledged to carry out — and the editorial labor he eventually performed is itself documented, because he prefaced the collection with a memoir, On the Life of Plotinus and the Arrangement of His Work, written around 301. That preface is the single source for nearly everything known about the man, and it doubles as an editor’s account of his own method. The reader is told, in the first person, exactly what was done and why.

Third-century Roman sarcophagus, the central reader traditionally identified as Plotinus surrounded by disciples; Museo Gregoriano Profano, Vatican. — via Wikimedia Commons (public domain)

What was done was an act of arithmetic raised to a principle. Porphyry had fifty-four treatises in front of him. He divided them into six sets of nine — and he tells the reader plainly that the division pleased him, the happy combination, as he put it, of the perfect number six with the nines. He did not arrange them in the order Plotinus wrote them. He knew that order; he gives it elsewhere in the Life, the chronological sequence of composition, and he wrote running summaries that follow it. But for the collection itself he chose theme over chronology, and within the themes he chose ascent: to each ennead he assigned, in his words, matter of one general nature, leading off with the themes presenting the least difficulty. The edition climbs. It begins where a human being stands and ends at the height a human being might reach.

The numerology was not idle. Six was the first perfect number — equal to the sum of its divisors — and nine was the square of three, the number that for the Pythagorean strand in this thought carried the weight of completion. Porphyry, trained at Athens under the critic Cassius Longinus and a philologist to the marrow, was the kind of editor for whom getting the shape right was part of getting the doctrine right. Where a treatise was too long he sometimes split it to make the count come out; where the count needed filling he could group shorter pieces. The seams show to modern eyes. But the frame held, and it held because it was also a teaching: the order of the books became an image of the order of reality.

The ladder of the six sets

Porphyry built three sections out of the six enneads — the first three forming one self-contained whole, the fourth and fifth a second, the sixth standing alone as the third — and the movement across them is a movement upward and inward.

The First Ennead gathers the treatises of a more ethical tendency: the nature of the living being and the human person, the virtues, dialectic, well-being, beauty, and the descent of the soul into the body. It is where the reader begins because it is where the embodied reader is — concerned with conduct, with happiness, with the first stirrings of the turn toward the higher. Its sixth treatise, On Beauty, is among the most read pages Plotinus wrote, and Porphyry notes, almost in passing, that it was the one treatise for which no summary was to hand when he compiled the rest.

The Second and Third Enneads turn to the physical world: the heavens, matter, the structure of the sensible cosmos, then providence, fate, the tutelary spirit, love, eternity and time, and — closing the third set — nature, contemplation, and the One. These are the treatises on what is below the soul and around it, the order of the visible. Porphyry placed certain essays here on grounds he spells out: the treatise on time went into the Third because of its handling of time, the essay on nature because of what it says of nature. The editor is visibly reasoning, slotting each piece by its dominant subject.

Marsilio Ficino (1433–1499), whose Latin translation and commentary, printed at Florence in 1492, reopened the Enneads to Europe. — from Alfred Gudeman, Imagines philologorum (1911), via Wikimedia Commons (public domain)

The Fourth Ennead is devoted to Soul — the world-soul and the individual soul, their unity and their descent, memory, immortality, the soul’s presence in the body. The Fifth rises to Intellect: the three primary realities, the genesis of things from the One, the nature of the intelligible world, the Forms thinking themselves. With the Fifth the reader has reached the level just below the summit. And the Sixth Ennead, the longest and most technical, climbs through the categories of being, number, the genera of reality, and the omnipresence of the real, until it arrives at the treatise placed last of all the fifty-four — On the Good, or the One. The collection ends, by design, at the threshold of what cannot be said. The last book of the edition is the highest object of the thought.

What the text teaches

The Enneads render a single vision: all that exists flows from one source beyond all existing things, and the whole labor of a soul is to flow back. The vision is stated not as one doctrine among others but as the structure of reality itself, and its terms became the working vocabulary of metaphysics for a thousand years.

At the summit is the One, which the treatises also call the Good. It is not a being, not even the greatest being, but the source of being, and therefore beyond being — the phrase Plotinus inherits from Plato’s Republic, epekeina tes ousias, beyond essence. To be a particular thing is to be limited; to think is to be split into a thinker and a thing thought; and the One is neither limited nor divided, so nothing can properly be predicated of it, not even unity, not even goodness, except as names taken from its effects. This is the wellspring of the whole later language of negation, the apophatic approach in which the highest reality is reached only by stripping every predicate away. The One does not deliberate, does not lack, does not reach outward. From its sheer overflow everything else comes to be.

What comes first is Nous — Intellect — the realm in which being and thought are the same act. Here are the Forms, not external to the mind that knows them but constituting it: Intellect is the totality of the Forms contemplating themselves, an eternal self-knowing in which knower and known coincide. Nous is the image of the One turned back toward its source, and from its fullness flows the third reality, Soul, which faces two ways at once. Looking up, Soul contemplates Intellect; looking down, it gives life, order, and motion to the world of bodies. It is the hinge between the eternal and the temporal, and on it the whole drama of descent and return turns.

Two motions hold the architecture together. The first is procession — proodos, the outflow that later ages called emanation — by which each level proceeds from the one above without diminishing it. The favored images are of radiance and overflow: the One like a spring that feeds every river and is never drained, like the sun that sheds light and loses nothing of itself. The countermotion is reversion — epistrophe, the turning-back — by which everything that proceeds yearns toward its source and is perfected by contemplating it. Procession and reversion are not two cosmologies but one rhythm, the breathing-out and breathing-in of all that is. At the far end of the procession, where the radiance thins to nothing, lies matter: not an evil power set against the Good but sheer privation, the formless absence that remains when the light gives out, and therefore identified with evil precisely as a lack, never as a thing the One made.

For the embodied soul this map becomes a road. The descent into a body is, in one of the treatises’ recurring tensions, both a fall and a necessity — an error when the soul becomes wholly absorbed in the bodily, yet also the cosmos filling itself to its lowest rung. The remedy is not the destruction of the body but the redirection of attention: through purification and contemplation the soul gathers itself, ascends through the levels it descended, and recovers its native standing in the intelligible. The summit of that ascent is henosis, union, which lies beyond contemplation itself — for in contemplation the soul still stands over against what it knows, and in union that last duality collapses. Plotinus can describe it only by negation: not vision, for there are no longer two; not thought, for thought divides; a presence beyond knowing. Porphyry, writing as a devoted witness rather than a neutral chronicler, reports that during the years he shared the circle Plotinus reached this union four times, and adds — with audible awe — that he himself attained it once, in his sixty-eighth year. The figures are the testimony of a reverent pupil about his master and himself. They stand in the text as the hagiographer’s witness to what the philosophy was finally for: not a creed to be held but a height to be climbed.

The long afterlife of a hard book

The Enneads are not an easy inheritance. They are an anthology of occasions, dense and elliptical, and almost their entire history is a history of mediation — of editors, abridgers, translators, and paraphrasers standing between the difficult Greek and the reader. The line of that mediation is among the longest in the record of thought.

It began at once, in the school itself. Porphyry carried the teaching westward and made it lucid. Iamblichus of Syria broke with the master’s contemplative inwardness, holding that reason alone could not lift the soul to the divine and setting ritual — theurgy, the work of the gods — at the center of the ascent. Proclus at Athens gave the whole edifice its most rigorous systematic form, the geometric propositions of the Elements of Theology spelling out as theorems what the Enneads had left as living essays. This later, ritual-laden development is a genuine departure from Plotinus, for whom return was an affair of inward turning rather than invocation — a fault line that runs through every subsequent quarrel about what a soul must do to come home. The scholarly account of the system and its sources is set out in Lloyd Gerson’s survey for the Stanford Encyclopedia of Philosophy and, in fuller narrative, in Edward Moore’s article for the Internet Encyclopedia of Philosophy.

The current did not stay pagan, and it did not stay Greek. Augustine of Hippo read the Platonists in Latin translation — Plotinus by way of Porphyry, through the renderings of Marius Victorinus — at the hinge of his conversion, and carried the language of the One, of the soul’s inward ascent, and of evil as privation into the heart of Christian thought, where it shaped the long tradition of Christian Neoplatonism. The resonance between this triadic architecture and the Christian doctrine of the Trinity was felt early and argued over for centuries: three realities, ordered and consubstantial in their distinct ways, the lower deriving from the higher without lessening it.

The strangest and most consequential migration was eastward into Arabic. In ninth-century Baghdad, in the circle of the philosopher al-Kindi, a Christian translator named Ibn Na’ima al-Himsi produced an Arabic paraphrase of material drawn largely from the Fourth, Fifth, and Sixth Enneads — and it circulated under the title the Theology of Aristotle, attributed to a philosopher who had been dead for six centuries before Plotinus was born. The misattribution was not a trivial slip; it was load-bearing. Because the emanationist metaphysics of the Enneads reached the Islamic world wearing the mask of Aristotle’s authority, it became the single most important conduit by which Neoplatonism entered Arabic philosophy, shaping the cosmologies of al-Farabi and of Avicenna. The text that taught the medieval East how being flows from the First was Plotinus in Aristotle’s borrowed name. The provenance of that paraphrase, and the long work of disentangling it, is laid out in Peter Adamson’s account for the Stanford Encyclopedia of Philosophy; the same misascribed text runs through the metaphysics of Islamic Neoplatonism.

In the Greek-reading West the full text slept until the Renaissance. The manuscripts came to Florence, and there Marsilio Ficino — who had already given Europe its Latin Corpus Hermeticum and a complete Plato — rendered the whole of the Enneads into Latin between about 1484 and 1486 and saw it printed, with an immense commentary, at Florence in 1492. It was the first complete printed Plotinus, and for centuries it was the principal door through which the West entered him; the study of how Ficino read what he translated is itself a field, treated at length in Stephen Gersh’s recent account of his Enneads commentary. Through Ficino the Plotinian One and the soul’s ascent passed into the Renaissance revival of Neoplatonism and its long entanglement with the Hermetic and magical traditions.

The pattern of the Enneads — a single source overflowing into ranked degrees of reality, and a soul climbing the same ladder back — recurs, by descent or by convergence, far beyond the line that runs from Porphyry’s edition. It stands behind much of later mysticism’s grammar of ascent and union; it rhymes with the emanative cosmologies that grew up in Jewish and Islamic settings; and a reader coming from the older theosophies of the East, the One beyond name and form of the Upanishads, meets in Plotinus a Greek who had wondered, on a failed march toward Persia, whether the wisdom of other peoples climbed the same mountain.

The hard text survives because the editor’s frame survived. The Greek itself was carried forward by the modern critical labor of Paul Henry and Hans-Rudolf Schwyzer, whose Plotini Opera is the standard. The classic complete English version is Stephen MacKenna’s Plotinus: The Enneads, issued in five volumes between 1917 and 1930, the last with B. S. Page — prized for a literary eloquence its translator frankly preferred over the literal, and hosted here together with Porphyry’s Life, which by Porphyry’s own design stands at the head of the whole collection. What that collection finally offers is not a system to be memorized but a single radiant descent and a single road back, traveled inward, by which a soul that has forgotten where it came from remembers, gathers itself, and is given back — as the dying man on the Campanian estate told it — to the divine in the All.

→ In the library: Plotinus: The Enneads (MacKenna, 1917–1930) · Porphyry: On the Life of Plotinus and the Arrangement of His Work (MacKenna) · Plotinos: Complete Works (Guthrie, 1918)

→ Related: Plotinus · Neoplatonism · The One · Emanation · Porphyry · Proclus · Iamblichus · Augustine Of Hippo · Corpus Hermeticum · Trinity · Aristotelianism · Upanishads · Nous · Soul · Platonism · Marsilio Ficino · Apophatic Theology · Theurgy · Islamic Neoplatonism · Christian Neoplatonism · Renaissance Neoplatonism