The Corpus Hermeticum is a collection of seventeen Greek philosophical and religious treatises attributed to Hermes Trismegistus, the "thrice-great" figure born from the fusion of the Greek god Hermes and the Egyptian god Thoth. Most scholars date these texts to roughly 100–300 CE in Roman Egypt. Together with the Latin Asclepius, fragments preserved by the anthologist Stobaeus and a Coptic text found at Nag Hammadi, they make up the philosophical Hermetica; the famous Emerald Tablet is a separate, shorter text first recorded in Arabic centuries later.
These distinctions matter because very different works are routinely blended into one story: the ancient Hermetica, the medieval Emerald Tablet, the 1908 Kybalion and Maurice Doreal's twentieth-century Emerald Tablets of Thoth the Atlantean each have their own date, language and history. Readers who want to weigh any claim about "Hermetic wisdom", whether a scholar's or Billy Carson's, need to know which text is actually being discussed.
Who was Hermes Trismegistus?
Hermes Trismegistus is a Greco-Egyptian figure who merged the Greek messenger god Hermes with Thoth, the ibis-headed Egyptian god of writing, wisdom and magic. Greeks living in Egypt during the Hellenistic period identified the two gods with each other, most famously at Thoth's cult centre of Khemenu, which they called Hermopolis, "the city of Hermes". For the background on the Egyptian side of the figure, see the site's guide to Thoth, the Egyptian god of wisdom.
The epithet Trismegistus means "thrice-greatest". Egyptologists have traced it to Egyptian titles that praised Thoth as "great, great, great", including an epithet recorded at the temple of Esna. Scholars disagree on when the Greek form first appears, from a second-century BCE ibis-cult record near Memphis (Copenhaver) to literary uses of the first and second centuries CE (Fowden).
By late antiquity he was imagined less as a god than as an ancient sage who taught disciples named Tat, Asclepius and Ammon, which is what later allowed readers to treat him as a historical person.
What is the Corpus Hermeticum?
The Corpus Hermeticum is a set of seventeen Greek treatises, compiled by Byzantine editors, that teach about God, the cosmos, the mind and the soul's liberation. They are traditionally numbered I to XVIII; the number XV is skipped because early printed editions once filled that slot with material that was later dropped.
Most are dialogues between Hermes and a pupil, closer to spiritual instruction than systematic philosophy. Their themes recur: God is one and is pure Mind; the cosmos is beautiful and divine; the human being is both mortal body and immortal mind; and knowledge of God (gnosis) is the path by which the soul returns to its source.
The Poimandres
The opening treatise, the Poimandres, is the best known. In it, a narrator later identified with Hermes meets a vast being called Poimandres, whom Copenhaver renders "Mind of sovereignty". Poimandres shows him a vision of creation: light, then darkness, then the ordering of the cosmos by the divine Word. The text describes the archetypal Human, made in God's image, descending through the planetary spheres and falling in love with nature, which explains why humans are part divine and part mortal. It ends with the soul's ascent back up through the seven spheres, shedding each passion on the way, until it is "in God".
What is the Asclepius?
The Asclepius is a longer Hermetic dialogue that survives complete only in Latin, translated from a lost Greek original known as the Perfect Discourse (Logos Teleios). It was the one philosophical Hermetic work that Latin-speaking Europe could read throughout the Middle Ages, long before the Greek treatises returned to the West.
Two passages made it famous: one on how Egyptian priests drew divine powers into temple statues, which Augustine criticised in book 8 of the City of God, and a lament prophesying that Egypt, "the image of heaven", would be abandoned by its gods. A Coptic excerpt of part of the Asclepius was later found among the Nag Hammadi codices, confirming that the text circulated in Egypt itself.
What other texts belong to the Hermetica?
Beyond the Corpus Hermeticum and the Asclepius, the philosophical Hermetica includes excerpts preserved by Joannes Stobaeus, a fifth-century anthologist; the longest is the Korē Kosmou, a cosmological dialogue between Isis and her son Horus.
The 1945 discovery of the Nag Hammadi library in Upper Egypt added more. Codex VI contains the Discourse on the Eighth and Ninth, a previously unknown Hermetic dialogue in which a teacher leads his pupil through a prayerful ascent to the eighth and ninth heavenly spheres, along with a Hermetic prayer of thanksgiving and the Asclepius excerpt. Their presence beside the Gospel of Thomas shows Hermetic and Christian-Gnostic readers moved in overlapping circles; the site's guide to the Gnostic gospels and Nag Hammadi covers that find in detail.
Scholars also distinguish a second, "technical" Hermetica: texts on astrology, medicine and pharmacology, alchemy and magic, also attributed to Hermes. Some of these are older than the philosophical treatises. Garth Fowden, in The Egyptian Hermes (1986), argued that the technical and philosophical texts are distinct but interdependent, both products of a long interaction between Greek and Egyptian culture, with roots in the world of Egyptian temple scribes and priests.
When were the Hermetic texts written?
Modern scholarship dates the philosophical Hermetica to roughly 100–300 CE in Roman Egypt; their Koine Greek and their echoes of Middle Platonism and Stoicism fit that period. Some technical Hermetic material may go back to the last centuries BCE.
That consensus took a long time to form. Renaissance readers believed the Hermetica were older than Plato and perhaps contemporary with Moses. In 1614 the classical scholar Isaac Casaubon, in his De rebus sacris et ecclesiasticis exercitationes XVI, showed from the vocabulary and style of the Greek that the texts could not be that ancient and belonged to the early Christian centuries.
Casaubon's dating stands, but Fowden and others later showed that "late" does not mean "not Egyptian": the Hermetica preserve genuine Egyptian religious ideas filtered through Greek philosophy.
How did the Hermetica shape the Renaissance?
The Corpus Hermeticum reached Florence around 1460, when the monk Leonardo of Pistoia brought a Greek manuscript containing the first fourteen treatises to Cosimo de' Medici. Cosimo had Marsilio Ficino set aside his translation of Plato to translate it first, and Ficino completed his Latin version in April 1463. It circulated under the title Pimander and was first printed in Treviso in 1471.
Ficino and his successors placed Hermes at the head of a prisca theologia, an "ancient theology" handed down from early sages to Plato and believed to harmonise with Christianity. Frances Yates, in Giordano Bruno and the Hermetic Tradition (1964), argued that this Hermetic revival fed Renaissance magic, philosophy and even early scientific thinking. Later historians have qualified her thesis, but not the reach of Ficino's translation.
What is the Emerald Tablet, and how does it differ?
The Emerald Tablet (Tabula Smaragdina) is a short alchemical text of about a dozen lines attributed to Hermes, first attested in an Arabic work, the Sirr al-khalīqa ("Secret of Creation"), compiled in the late eighth or early ninth century and ascribed to Balīnās, the Arabic name for Apollonius of Tyana. It is not part of the Corpus Hermeticum and has no known Greek original.
Latin versions appeared in the twelfth century; Hugo of Santalla translated the Secret of Creation around 1145–1151, and other Latin renderings followed. The Tablet became a foundational text of European alchemy. Isaac Newton made his own English translation, which survives at King's College, Cambridge (Keynes MS 28), probably written in the late 1680s or early 1690s. It begins: "Tis true without lying, certain & most true. That which is below is like that which is above & that which is above is like that which is below to do the miracles of one only thing."
That second line is the source of "as above, so below", the compressed form popularised by nineteenth-century occultists such as Helena Blavatsky. The site's pillar on the Emerald Tablets of Thoth separates it from later texts sharing its name.
How the Kybalion and Doreal's tablets get conflated
Two modern books are often presented as if they were part of the ancient Hermetica, and neither is. The Kybalion, published in Chicago in 1908 by the Yogi Publication Society under the pseudonym "Three Initiates", is usually attributed to the New Thought writer William Walker Atkinson. Its seven principles, including Mentalism and Correspondence, borrow Hermetic language, but scholars read it as a product of early twentieth-century New Thought rather than a translation of anything ancient. The site's explainer on the Kybalion and the seven Hermetic principles covers it in full.
The Emerald Tablets of Thoth the Atlantean is a separate, longer work by the American esoteric teacher Maurice Doreal (1898–1963), founder of the Brotherhood of the White Temple. Doreal said he had found the tablets in the Great Pyramid in 1925 and translated them himself. Its poetic tablets on Atlantis, the Halls of Amenti and Thoth's teaching have no known ancient manuscript behind them, and historians treat the work as twentieth-century esoteric literature. A similar gap separates the Egyptian "Book of Thoth" of the scribal tradition from modern books using that title, a story told in the Book of Thoth explained.
The conflation usually runs like this: "as above, so below" appears in both the medieval Tablet and the Kybalion, Doreal borrows the Emerald name, all invoke Thoth or Hermes, and so four bodies of text get described as one ancient teaching.
Billy Carson's reading
This is the ground Billy Carson knows best. In The Compendium of the Emerald Tablets, his 2019 commentary, Carson treats Thoth, known to the Greeks as Hermes, as a real teacher from an advanced Atlantean civilisation rather than a myth. He reads Doreal's tablets as a coherent system, decoding them passage by passage as instructions for consciousness, and connects them to sacred geometry, Egyptian temple design and Hermetic philosophy.
Carson proposes two manifestations of the Emerald Tablets: an older body of teaching created by Thoth, and a later period when Thoth appeared as Hermes the Thrice Great, associated with the single Emerald Tablet of the alchemists. On this view, Doreal's tablets and the Hermetic tradition are expressions of one teacher's work, which is why he reads them side by side. The principle of correspondence, "as above, so below", is one he returns to throughout.
In his conversation with Templar researcher Timothy Hogan, Carson extends the argument: he points to the recurrence of a wisdom-bringer figure in many cultures as evidence for a single historical teacher, while Hogan traces the Emerald Tablet's transmission through Apollonius of Tyana and Arabic translators to the Knights Templar. The site's write-up of the Emerald Tablets and the Knights Templar conversation summarises both positions.
Mainstream scholarship dates the Corpus Hermeticum to Roman Egypt, the Emerald Tablet to early Islamic-era Arabic sources and Doreal's tablets to the twentieth century. Carson's reading treats the teaching as more important than the manuscript trail; it is an interpretive and spiritual position, presented here as his.
Watch, read and go deeper
The full Compendium is available as an audiobook series on 4BK TV in Compendium of the Emerald Tablets (audio book), where Billy Carson reads and explains the tablets. His print titles are listed on the 4biddenknowledge books page. For the wider map of Thoth, Hermes, alchemy and the tablet traditions, start at the Emerald Tablets topic hub, which links every related explainer on the site.
Frequently asked questions
Is the Emerald Tablet part of the Corpus Hermeticum?
No. The Corpus Hermeticum is a group of seventeen Greek treatises from roughly 100–300 CE, while the Emerald Tablet is a short alchemical text first attested in Arabic in the late eighth or early ninth century. Both are attributed to Hermes Trismegistus, which is why they are often grouped together, but they have separate histories.
Who translated the Corpus Hermeticum into Latin?
Marsilio Ficino translated the first fourteen treatises into Latin for Cosimo de' Medici, completing the work in April 1463. His translation, known as the Pimander, was first printed in Treviso in 1471 and spread the Hermetica across Renaissance Europe.
Was Hermes Trismegistus a real person?
There is no historical evidence that a single author named Hermes Trismegistus wrote the Hermetica; scholars regard the name as a sacred attribution used by multiple anonymous writers in Roman Egypt. The figure grew out of the Greek identification of Hermes with the Egyptian god Thoth. Billy Carson's Compendium takes the view that Thoth/Hermes was a real Atlantean teacher.
Is the Kybalion an ancient Hermetic text?
No. The Kybalion was published in 1908 under the name "Three Initiates" and is generally attributed to the New Thought author William Walker Atkinson. It uses Hermetic themes such as correspondence, but scholars see it as a modern work rather than a translation of an ancient source.
What does "as above, so below" mean?
The phrase compresses the second line of the medieval Emerald Tablet, which states that what is below is like what is above. In alchemy and Hermetic thought it expresses correspondence between the cosmos and the individual, so that understanding one reveals the other.
Sources and further reading
- Brian P. Copenhaver, Hermetica: The Greek Corpus Hermeticum and the Latin Asclepius in a New English Translation, with Notes and Introduction (Cambridge University Press, 1992).
- Garth Fowden, The Egyptian Hermes: A Historical Approach to the Late Pagan Mind (Cambridge University Press, 1986).
- Frances A. Yates, Giordano Bruno and the Hermetic Tradition (1964).
- Isaac Casaubon, De rebus sacris et ecclesiasticis exercitationes XVI (1614).
- Isaac Newton, Tabula Smaragdina translation and notes, Keynes MS 28, King's College, Cambridge.
- James M. Robinson, ed., The Nag Hammadi Library in English, for the Discourse on the Eighth and Ninth (Codex VI).
- Billy Carson, The Compendium of the Emerald Tablets (2019).
