The Ideas

Theurgy

Can ritual do what philosophy cannot? Late antiquity’s most sophisticated answer was theourgia, “god-working”, ritual practice aimed at uniting the soul with the divine.

Where the word comes from

The word first appears in the 2nd century CE with Julian the Theurgist, the name attached to the Chaldean Oracles, a set of hexameter verses that later Platonists treated as revelation. Dodds hedges this: Julian, who lived under Marcus Aurelius, is the earliest person described as theourgos only “so far as we know”, and, following Bidez, Dodds thought Julian probably coined the title to set himself apart from the theologoi, who “talked about the gods” while he “acted upon” them (Dodds 1947, reprinted 1951, pp. 283-84). On that reading, Greek theourgia sets itself against theologia: not speaking about the gods, but doing the divine work.

What a theurgist actually did

What the sources describe is ritual built on correspondences: invocations and hymns; synthemata or symbola, stones, plants and names held to carry a god’s signature; prayer and purification; and, at the far end, the animating of statues. Iamblichus insists the effect comes from the gods acting through these tokens, not from the practitioner’s will (De mysteriis II.11). That is the line he draws against the magician, who in his account tries to compel. Answering Porphyry’s suggestion that the higher beings act because invocation draws them down by necessity, he replies that the god “is superior to necessity” and that the rites rise to the higher beings by assimilation, achieving their effect “not through force” (III.18, tr. Clarke, Dillon and Hershbell). The principle of correspondence these rites rely on is older than theurgy and reaches the modern reader through the Emerald Tablet, as the slogan as above, so below.

In the sources

Its great defence is Iamblichus’ Reply to Porphyry (transmitted as De mysteriis and dated by its English translators to between 280 and 305 CE), written in the guise of the Egyptian prophet Abamon. Against Porphyry’s scepticism, Iamblichus argues that ritual works through divine symbols (synthēmata) and divine action: “it is not pure thought that unites theurgists to the gods” (De myst. II.11, p. 96 Parthey, tr. Clarke, Dillon and Hershbell). In the fifth century Proclus called theurgy “a power higher than all human wisdom” (Platonic Theology I.25, 113.6-10 Saffrey-Westerink, tr. Dodds). The Hermetic connection is explicit: the De mysteriis opens with Hermes, “the god who presides over rational discourse” (I.1), promises to settle philosophical questions “by recourse to the ancient stelae of Hermes” (I.2), and later says that the documents “which circulate under the name of Hermes contain Hermetic doctrines” (VIII.4). According to the Stanford Encyclopedia of Philosophy entry on Iamblichus (revised 2023, section 2.3), he regarded the Hermetic books as the genuine source of Greek philosophy.

The Hermetic relation, kept clean

The philosophical Hermetica are not theurgic manuals; the Corpus Hermeticum teaches through dialogue and vision, not rite. But the Asclepius (23-24, 37-38), humans “making gods” by drawing spirits into statues, supplied the most famous ancient description of what later readers assimilated to theurgy. Scholars debate the linkage. Bull (2018) returns, cautiously, to Richard Reitzenstein’s idea (1904) that the Hermetica originated in a small community of Greek speakers interested in both Egyptian wisdom and Greek philosophy, led by Egyptian priests, which may later have grown into a larger number of voluntary associations. The De mysteriis, for its part, speaks through an Egyptian priestly figure, the prophet Abamon; the comparison is ours, not Bull’s. Reviewing the book, Korshi Dosoo (BMCR 2020.02.23) recalls Festugière’s view that the Egyptian elements are largely decorative, which complicates the priests-as-authors hypothesis.

The verdict on theurgy itself has changed more clearly. Dodds (1947) called the De mysteriis “a manifesto of irrationalism” and theurgy “magic applied to a religious purpose” (reprinted 1951, pp. 287 and 291). Against this reading, Shaw (1995) argues that theurgy follows from Iamblichus’ doctrine of the soul: because the soul descends completely into the body, it needs rites that take its bodily acts into a divine pattern (introduction), and the charge of irrationality judges the Neoplatonists by modern standards, since “our norms of rationality are not the norms of the Neoplatonists” (chapter 18 in the 2014 edition). The same Stanford Encyclopedia of Philosophy entry (section 2.3) reports that recent scholarship has questioned the traditional picture of Iamblichus’ stance as irrational.

Traps

Occultist reception from the Golden Dawn onward uses “theurgy” for ceremonial magic generally and labels the whole package “Hermetic magic”, fusing categories the ancients kept distinct. The tidy scheme “theurgy = white magic, goetia = black magic” is also a later simplification, it is not Iamblichus’ distinction.

Why it matters

On our reading, theurgy is where late-antique philosophy admitted that knowing about the divine is not the same as reaching it, the same gap the Hermetic rebirth addresses from another side. Understanding the two as neighbours, not synonyms, is a good test of whether a modern book on “Hermetic magic” knows its history.

Fair questions

Where does the word theurgy come from?

From Greek theourgia, divine work, first attested in the 2nd century CE with Julian the Theurgist and the Chaldean Oracles; Dodds, following Bidez, thought Julian probably coined the title theourgos to set himself apart from the theologoi, who spoke about the gods.

What is the difference between theurgy and magic?

In Iamblichus' account the theurgist does not compel anything: the gods act through the ritual tokens they themselves ordained. Magic, in his picture, tries to force results by human will. Modern occult usage blurs the two, and the white-magic and black-magic split is later still.

Is theurgy a Hermetic practice?

Not strictly. Theurgy belongs to Neoplatonism (Iamblichus, Proclus). The philosophical Hermetica are not theurgic manuals, but the Asclepius' statue-animation passages describe something later readers assimilated to theurgy, and Iamblichus appealed to the ancient stelae of Hermes and to the writings circulating under Hermes' name as authority.

Is theurgy just magic?

Iamblichus would say no: theurgy works through divine symbols and divine action, not human technique, and aims at the soul's union with the gods. 'Theurgy = white magic vs. goetia = black magic' is a later simplification.

Did Neoplatonists agree about theurgy?

No, it was a live debate. Plotinus and (ambivalently) Porphyry held philosophy alone leads up; Iamblichus, then Proclus, argued ritual is necessary because thought alone cannot bridge the gap to the gods.

Sources & further reading

• Riccardo Chiaradonna and Adrien Lecerf, “Iamblichus”, Stanford Encyclopedia of Philosophy (first published 27 August 2019, substantive revision 7 November 2023), sections 2.3 and 6.3.
• Iamblichus, De mysteriis: Greek text (Édouard Des Places) with English translation by Emma C. Clarke, John M. Dillon and Jackson P. Hershbell, Iamblichus: De mysteriis, Writings from the Greco-Roman World 4 (Atlanta: Society of Biblical Literature, 2003); cited by book and chapter, with the page numbers of Gustav Parthey’s edition (Berlin, 1857), which the translation keeps; PDF at the publisher.
• E. R. Dodds, “Theurgy and its Relationship to Neoplatonism”, Journal of Roman Studies 37 (1947), pp. 55-69, doi:10.2307/298455; reprinted with minor changes as Appendix II of The Greeks and the Irrational (Berkeley and Los Angeles: University of California Press, 1951), the edition cited for page numbers.
• Gregory Shaw, Theurgy and the Soul: The Neoplatonism of Iamblichus (University Park: Pennsylvania State University Press, 1995); revised 2nd edition (Kettering, OH: Angelico Press/Sophia Perennis, 2014), the edition checked for the introduction and chapter 18.
• Ruth Majercik, The Chaldean Oracles: Text, Translation and Commentary, Studies in Greek and Roman Religion 5 (Leiden: Brill, 1989).
• Christian H. Bull, The Tradition of Hermes Trismegistus: The Egyptian Priestly Figure as a Teacher of Hellenized Wisdom, Religions in the Graeco-Roman World 186 (Leiden: Brill, 2018); reviewed by Korshi Dosoo, Bryn Mawr Classical Review 2020.02.23.
• Proclus, Théologie platonicienne, ed. and tr. H. D. Saffrey and L. G. Westerink, 6 vols. (Paris: Les Belles Lettres, 1968-1997): I.25, p. 113.6-10.
• Brian P. Copenhaver, Hermetica: The Greek Corpus Hermeticum and the Latin Asclepius (Cambridge: Cambridge University Press, 1992): Asclepius 23-24 and 37-38.
• Stanford Encyclopedia of Philosophy: Iamblichus.