Hermeticism is the name for a body of religious and philosophical teaching attributed to a figure who never lived, written down in the first centuries of the common era, misdated by more than a thousand years during the Renaissance, and credited ever since with an influence out of all proportion to its length. It is the nearest thing the Western esoteric traditions have to a common source. This orientation explains what it is, where its texts come from and how to read them without being misled by their reputation.
A legendary author
The teachings are ascribed to Hermes Trismegistus, the Thrice-Greatest Hermes. He is a composite. In Egypt under Greek and then Roman rule, the Greek god Hermes, messenger and guide of souls, was identified with the Egyptian Thoth, god of writing, reckoning and wisdom. From the merger came a new figure: not quite a god, but an ancient sage who had received divine knowledge and set it down in books.
Attributing a text to Hermes was a way of claiming authority, not a statement about who held the pen. The practice is called pseudepigraphy and it runs through the whole of esoteric literature, as our guide to grimoires explains. The real authors were anonymous teachers writing in Greek, most likely in Egypt, between about the first and third centuries.
The texts
Scholars divide the surviving material into two groups.
The philosophical Hermetica are short dialogues and sermons on God, the cosmos and the soul. The most important collection is the Corpus Hermeticum, seventeen Greek treatises assembled by later editors. Alongside it stands the Asclepius, a longer dialogue that survives complete only in Latin. A few further pieces came to light in 1945 among the Coptic books found near Nag Hammadi in Upper Egypt, which also preserved much of what we know about Gnostic myth.
The technical Hermetica are older and more practical: treatises on astrology, the properties of plants and stones, alchemy and magic. Later readers kept the two groups apart, treating one as lofty philosophy and the other as superstition. Their original audiences probably did not.
A third text needs separate mention. The Emerald Tablet is a cryptic statement of a dozen or so lines, first attested in Arabic around the eighth or ninth century and translated into Latin in the twelfth. It is far later than the Greek treatises, but it became the most quoted Hermetic text of all, and the charter of the alchemists.
What the Hermetica teach
The treatises do not agree on every point, and it is a mistake to force them into a system. Certain themes recur.
God is Mind. The highest reality is a divine intellect, the source of everything, itself beyond description. In the first treatise of the Corpus, a being who calls himself the Mind of sovereignty appears to the narrator in a vision and shows him the making of the world.
The cosmos is alive. The universe is a single living thing, an image of its maker, bound together by sympathy. Nothing in it is truly dead or truly separate.
The human being is double. Humanity has a mortal body subject to fate and the stars, and an immortal mind that is of the same substance as God. This makes the human a marvel, a creature who belongs to both worlds.
Salvation is knowledge. The soul is freed not by ritual observance or obedience but by gnosis: a direct recognition of its own divine nature. Several treatises describe this as a rebirth, and one narrates the soul's ascent through the planetary spheres, surrendering a vice at each.
The tone varies. Some treatises celebrate the visible world as a beautiful work of God. Others regard the body as a prison. Readers who want a single Hermetic attitude to matter will not find one.
As above, so below
The phrase by which Hermeticism is popularly known is a paraphrase of the second line of the Emerald Tablet, which says, in the usual rendering, that what is below is like what is above, and what is above is like what is below, for the accomplishing of the wonders of the one thing.
This is the doctrine of correspondence. The universe is built in layers that mirror one another: the heavens and the earth, the cosmos and the human body, the planets and the metals. To know one level is to have a key to the others. Astrology, alchemy and natural magic all rest on this assumption. It is what makes them, in their own terms, rational arts and not mere wishing. If the levels really do answer to each other, then operating on one is a way of operating on another.
The Renaissance mistake that mattered
Around 1460 a Greek manuscript of the Corpus Hermeticum reached Florence. The city's ruler considered it so important that he instructed his translator to put aside the philosophical dialogues he was working on and render Hermes into Latin first. The translation was finished in 1463 and printed in 1471, and it went through edition after edition.
The excitement rested on a belief about dates. Renaissance scholars took Hermes to be a real Egyptian sage of immense antiquity, a contemporary of the biblical patriarchs or older. On that assumption, the resemblances between the Hermetic writings and later Greek philosophy, and their apparent anticipations of Christian teaching, were astonishing. They suggested a single ancient wisdom, revealed at the dawn of time and handed down through a chain of sages. This idea of a primordial theology licensed generations of thinkers to study magic, astrology and the dignity of human powers as a pious enterprise.
In 1614 a classical scholar examined the Greek and showed, from its vocabulary and its philosophical borrowings, that the treatises could not be older than the early Christian era. They resembled later philosophy because they came after it. The demonstration was sound, and learned opinion gradually accepted it. But by then a century and a half of European thought had been built on the error, and the image of Hermes the ancient Egyptian has never entirely left the esoteric imagination.
Modern Hermeticism and its inventions
The word Hermetic was claimed again during the occult revival of the nineteenth century, when ceremonial orders and private students adopted it for systems that combined ritual magic, astrology, the tarot and the Kabbalah. Little of this derives from the ancient treatises. It is a new construction using an old name, a common pattern described in our map of the Western esoteric tradition.
One example causes persistent confusion. The widely repeated list of seven Hermetic principles, namely mentalism, correspondence, vibration, polarity, rhythm, cause and effect, and gender, comes from The Kybalion, a book published anonymously in 1908. It is a product of the self-improvement philosophies of its own period. Only the principle of correspondence has clear roots in the older literature. The book may be read with interest, but not as a summary of the Corpus Hermeticum.
Reading advice
- Begin with the first treatise of the Corpus, the vision of the divine Mind. It is short and contains most of the essential themes.
- Read the Asclepius for its lament over the future abandonment of Egypt by its gods, one of the great passages of ancient religious writing.
- Use a modern scholarly translation with notes. Translations made during the occult revival are often beautiful and frequently unreliable.
- Keep the dates in mind. The philosophical treatises are late antique. The Emerald Tablet is early medieval. The seven principles are from 1908. Each is worth reading, and they are not the same thing.