Iamblichus

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Iamblichus of Chalcis (c. 245 – c. 325) reshaped the Neoplatonism he inherited around a single conviction: the soul descends whole into the body, and what descends whole cannot climb back by thinking alone. The gods themselves supplied what thought cannot — theurgy, “god-work,” the body of consecrated rites, names, symbols, and material objects through which the divine reaches down to lift a soul that cannot lift itself. He studied with Porphyry, the editor of Plotinus, broke with him on exactly this point, and the break set the course of the school for the two centuries it had left. Karl Praechter called him the second founder of Neoplatonism; what he founded was a way of being a Platonist whose final work is hieratic — the crown of the virtues is the rite.

A Name That Means “He Is King”

What is known of the life is thin; the one ancient biography, in Eunapius’s Lives of the Philosophers and Sophists, is more hagiography than record. He was born at Chalcis in Coele Syria — northern Syria, after Septimius Severus’s division — traditionally Chalcis ad Belum. His family, prominent and prosperous in Roman Syria, traced its line to the Sampsigeramids of Emesa, the client dynasty remembered as priest-kings, which had reached the imperial throne itself with Elagabalus; Damascius preserves the testimony, and the names agree: “Iamblichus” is Hellenized Aramaic — Yamlīkū, “he is king,” the gloss rendered variously — a name that recurs among the Emesene dynasts. The dates stay circa by necessity: born around 245, dead around 325 — by an older reckoning before 333, under Constantine.

Anatolius, Porphyry, and the School at Apamea

His first teacher was Anatolius, “who ranks next after Porphyry” in Eunapius’s phrase — whether this is the Anatolius who became bishop of Laodicea remains uncertain — whose arithmological bent shows in everything Iamblichus later built on number. He then joined Porphyry, very likely at Rome; Porphyry dedicated On the “Know Thyself” to him, and his son Ariston married Amphiclea of Plotinus’s own circle. The break that followed cannot be dated; what is accepted is that he settled at Apamea, where Numenius of Apamea had made the city a Pythagorean-Platonic seat a century before. The wealthy notable Sopater welcomed him, and he kept an estate at Daphne, outside Antioch. The school flourished; of the pupils who remembered him with reverence Eunapius names about a dozen — Sopater, Aedesius, Eustathius, Theodorus of Asine, Euphrasius — and to them can be added Dexippus, whose commentary on Aristotle’s Categories survives.

Around the master the wonder-stories gathered: that in prayer he rose ten cubits above the earth, body and garments turned a beautiful golden hue — a rumor Iamblichus laughed off (“He who thus deluded you was a witty fellow”); that at Gadara’s hot springs he summoned the twin spring-spirits Eros and Anteros. Eunapius had the stories from Chrysanthius, who had them from the eyewitness disciple Aedesius, and they say more about his standing than his biography. The standing was real either way: his students lived near a man for whom the gods were close.

The Reply of Master Abamon

Porphyry had addressed a letter of difficulties to an Egyptian priest named Anebo: why sacrifice, what divination is, how impassible gods can be summoned by rites — questions as likely a teacher’s deliberate perplexities as an attack. Iamblichus answered in costume. The manuscripts title his answer the Reply of Master Abamon to Porphyry’s Letter to Anebo, and Solutions to the Difficulties Contained Therein: he writes as Abamon, an Egyptian prophet and teacher senior in authority to Porphyry’s addressee. Composed around 300, it is the book for which he is chiefly read. Its familiar title is a Renaissance gift: Marsilio Ficino’s Latin epitome, printed by Aldus Manutius at Venice in 1497 as De mysteriis Aegyptiorum, Chaldaeorum, Assyriorum, fixed On the Mysteries of the Egyptians to the book, and only the 2013 critical edition restored the manuscript form. Alexander Wilder’s 1911 English already carried the frame on its title page: Reply of Abammon, the Teacher.

The Reply defends the inherited rites — sacrifice, prayer, divination, the apparatus of the ancient mysteries — and in defending them builds a philosophy of the divine orders and the soul’s limits. Its opening distinguishes three disciplines — philosophy, theology, theurgy — and behind them three founding traditions: the Egyptian, in the books of Hermes Trismegistus, claimed as the genuine source of Greek philosophy; the Chaldean, in the Chaldean Oracles delivered under Marcus Aurelius through Julian the Theurgist, which Iamblichus expounded in a lost commentary of at least twenty-eight books; and the Greek, in Pythagoras and Plato. Ancient circulation was narrow — a single secure citation survives, in Proclus — but the book’s consequence is doctrinal, and, a millennium later, typographic.

The Soul That Came All the Way Down

Plotinus had taught that the soul never wholly descends — its highest part remains rooted in Intellect — and Porphyry held the corollary: the soul rises to the divine by contemplation, thinking its way up the chain of being. Iamblichus refused the consolation. Nothing in us remains impassible and always thinking; the soul descends entire, and has fallen too far for thought to carry it the whole distance back. His Timaeus commentary attacks Plotinus and Theodorus of Asine by name on the point; his On the Soul makes the rejection systematic. Descending, the soul — lowest of the higher kinds, “connatural to nothingness” in the Reply’s stark phrase — is altered in its very essence, at once changing and unchanging, dying and undying: the “changing self,” in Carlos Steel’s name for the doctrine, with no untouched summit from which to think its way home.

Two consequences follow. First, embodiment is not exile: the soul’s presence in the world is natural and lawful — against Numenius and his school, Iamblichus refused to call incarnation an evil — and the cosmos is not the soul’s prison but the field of its work. Second, the ascent runs on the gods’ own goodwill and illumination — grace — and the gods have given the means. They sowed their tokens, the synthēmata, through matter — stone, plant, sound, name — each held in a chain running back to the god who set it there. The rite does not move the gods, who are impassible and beyond compulsion; it makes the soul fit to receive what is always being given — not magic in the manipulative sense but the opposite, an act the gods perform, to which the rite only consents. “It is the accomplishment of acts not to be divulged and beyond all conception,” the Reply says, “and the power of unutterable symbols, understood solely by the gods, which establishes theurgic union.” The rite in its fullness is treated under theurgy; the Reply’s root answer to Porphyry is that knowledge of the gods is innate, and encompasses knowledge of self. Hence his scale of virtues rises through seven grades, the theurgic — hieratic — virtues standing above the contemplative. Theurgy exceeds reason without opposing it: the consummate theurgist was expected to be the consummate theologian.

The Architecture Above

He multiplied the levels of reality far beyond Plotinus’s map — not from extravagance but from a horror of gaps. Above even the One as cause he set a wholly unspeakable principle; beneath the One, Limit, the Unlimited, and the One-Being. He drew his best-known distinction between the intelligible and the intellective orders, and demoted the Demiurge of the Timaeus to third member of a paternal triad; no later Neoplatonist again identified the craftsman of the cosmos with the first principle. Between the gods and human souls he ranked archangels, angels, demons, heroes, and archons cosmic and enmattered. The principle throughout is continuity: nothing proceeds from its source without a mean term — the mechanics are treated under emanation. Between the intelligible and the sensible he set the mathematicals — not abstractions but a realm of being, each number with an essence of its own — making mathematics a divinely inspired discipline, “elevating, purifying and perfective.” Through his recension of Nicomachus that road ran to Martianus Capella, Boethius, and the medieval quadrivium.

The Pythagorean Program and the Order of the Dialogues

The writings are better attested than the man, though even they survive mostly at second hand. The wisdom the rites enact had a lineage, and its fountainhead was Pythagoras. His summa On Pythagoreanism ran to ten books on Dominic O’Meara’s reconstruction; the first four survive — On the Pythagorean Life, the Protrepticus, On General Mathematical Science, the introduction to Nicomachus’s Arithmetic — the lost middle books partly recoverable through Psellus. (The Theologoumena arithmeticae circulating under his name is not his: an anonymous compilation ascribed to Iamblichus or to Anatolius.) The Life presents Pythagoras as bearer of a divine revelation handed down from Orpheus through Aglaophamus, takes the pseudo-Pythagorean treatises as genuine, and became the tendentious source for much of what later ages believed about the Pythagorean life and about Pythagoreanism itself.

The same hand arranged the reading of Plato: twelve dialogues in two cycles, per the anonymous Prolegomena — ten from the First Alcibiades, seed of the whole, through ethics, logic, physics, and theology to the Philebus; then the two “perfect” dialogues, the Timaeus for physics crowned by the Parmenides for theology. Each dialogue has one aim, its skopos; Plato is harmonized with Pythagoras, Aristotle set as the preliminary course beneath. That order governed the Platonic schools to their end — it is why the commentaries of Proclus fall where they do.

Of the rest, time has kept fragments: the commentaries on Plato and Aristotle survive only in quotation, some eight hundred fragments and testimonia in all; excerpts of On the Soul and a dozen letters on fate, providence, and rulership stand in Stobaeus; On the Gods and the great Oracles commentary are gone.

Pergamon, the Emperor, the Printing House

His own century argued over him: Themistius sneered at “the man of Chalcis,” and Theodorus of Asine drifted back toward Plotinian intellectualism. But the line held. Aedesius carried the school to Pergamon; his pupils Maximus of Ephesus and Priscus taught the young Julian, the future emperor, around 350; and when that Julian — the emperor, not the second-century Julian the Theurgist of the Oracles — undertook to restore the worship of the old gods, Iamblichus’s teaching formed the philosophical backbone of the attempt. The emperor’s genuine praise stands in his Hymn to King Helios: Iamblichus is “by no means inferior to [Plato] in genius,” the inspired master whose writings initiated him. The more famous flattery — that one letter of Iamblichus is worth more than all the gold of Lydia — is not the emperor’s: it stands in the pseudo-Julian Letter 78, the work of an anonymous Syrian sophist writing in Iamblichus’s lifetime, preserved among the emperor’s genuine letters; the emperor, born in 331, never knew him. The epithet “the divine Iamblichus” likewise belongs to the tradition — to the citation habit of the later schools and to the Renaissance, which rarely printed his name without it.

The harvest came at Athens, though no continuous line runs there — more than a century separates his death from Plutarch of Athens. There Syrianus and Proclus systematized the theurgic Neoplatonism Iamblichus founded — a construction told at its own length in the entry on Proclus. When Ficino epitomized the Reply for the Aldine press in 1497, the idea of a rite that draws the divine down entered the long history of Western magic. English readers received the book — his defense of the rites — from Thomas Taylor, in his 1821 version, and from Wilder’s Theurgia of 1911.

Editions and Scholarship

For much of the twentieth century the verdict was E. R. Dodds’s: the theurgic turn as a decline, philosophy surrendering to ritualism and superstition. Gregory Shaw’s Theurgy and the Soul: The Neoplatonism of Iamblichus (Pennsylvania State University Press, 1995; second edition 2014; https://doi.org/10.2307/2887556) turned the verdict around, reading theurgy as a coherent response to a real problem in the system — if the One is truly beyond reach, the upward way needs more than the mind can supply. Whether that move rescued Neoplatonism or compromised it remains a live question; the argument now treats Iamblichus as a philosopher rather than a symptom.

The standard English of the Reply is Emma C. Clarke, John M. Dillon, and Jackson P. Hershbell, Iamblichus: De mysteriis (Society of Biblical Literature, 2003; https://books.google.com/books?id=UJuDa8G7RikC), the first complete translation since Taylor’s. Henri Dominique Saffrey and Alain-Philippe Segonds’s Budé edition, Jamblique: Réponse à Porphyre (Les Belles Lettres, 2013), restored the manuscript title and identified “De mysteriis” as Ficino’s framing; the field is surveyed in Riccardo Chiaradonna and Adrien Lecerf’s Stanford Encyclopedia of Philosophy entry (https://plato.stanford.edu/entries/iamblichus/). John M. Dillon edited the Platonic commentary fragments (Brill, 1973; revised 2009; https://doi.org/10.1163/9789004320444); John F. Finamore and Dillon the De anima (Brill, 2002; https://doi.org/10.1163/9789047401421), Dillon and Wolfgang Polleichtner the Letters (Society of Biblical Literature, 2009; https://doi.org/10.1017/s0009840x11001119). Dominic J. O’Meara’s Pythagoras Revived (Clarendon Press, 1989; https://doi.org/10.1093/0198239130.001.0001) reconstructed the ten-book On Pythagoreanism; The Divine Iamblichus, ed. H. J. Blumenthal and E. Gillian Clark (Bristol Classical Press, 1993; https://doi.org/10.1017/s0009840x00293025), carries the tradition’s epithet in its title. The public-domain witnesses remain open: Eunapius’s Lives in Wilmer Cave Wright’s 1921 translation (https://www.tertullian.org/fathers/eunapius_02_text.htm), Taylor’s 1821 On the Mysteries in the Wikisource transcription at https://en.wikisource.org/wiki/Iamblichus_on_the_Mysteries_of_the_Egyptians,_Chaldeans,_and_Assyrians_(Second_Edition_1895), and Alexander Wilder’s Theurgia at https://esotericarchives.com/oracle/iambl_th.htm.

Sixteen centuries of editors have renamed and reframed the book; what it teaches has not moved. A Syrian master writing under an Egyptian name told his Greek teacher that some knowledge cannot be reached by argument — that the soul came all the way down, and that the gods, who knew it would, left their tokens in the world to bring it home.

→ In the library: Iamblichus — On the Mysteries (Taylor, 1821) · Porphyry — On the Life of Plotinus (MacKenna)

→ Related: Neoplatonism · Proclus · Plato · The One · Emanation · Hermes Trismegistus · Theurgy · Pythagoras · Pythagoreanism · Chaldean Oracles Tradition · Marsilio Ficino · Thomas Taylor