Basilides taught in Alexandria during the reigns of Hadrian and Antoninus Pius (c. 117–138 CE) — a generation before Valentinus, making him the earliest Gnostic systematizer whose school we can document in depth. His cosmology is staggering in its ambition: 365 heavens stacked above our world, each inhabited by its own order of angels, each governed by a ruler whose name corresponds to one of the 365 days of the solar year. At the apex stands a God so transcendent that even "existence" cannot be predicated of Him — the Non-Existent God, the Ineffable, the root before all roots. And the cosmic password, the name that encodes the entire structure, is ABRAXAS — seven letters whose Greek numerical values sum to 365.

"God is not being, not substance,
not nature, not person, not form —
He is without any predicate,
not even the predicate of existence."
— Basilides, reconstructed from Hippolytus, Refutatio VII.20–27 (c. 2nd century CE)

The Basilidean Transmission

Glaucias Interpreter of Peter · 1st c.
Basilides c. 117–138 CE · Alexandria
Isidore Son of Basilides · ethics & commentary
Basilidean School Egypt · 2nd–4th century
📜 Preserved via Irenaeus & Hippolytus Hostile but detailed accounts

The Teacher in Alexandria

Basilides taught in Alexandria — the ancient world's intellectual capital — during the reign of Hadrian (117–138 CE), making him a contemporary of the great Neoplatonist precursors and a generation before Valentinus. He claimed apostolic authority through an otherwise unknown disciple named Glaucias, said to be an interpreter of the Apostle Peter — a claim that positioned his gnōsis as direct transmission from the earliest Christianity rather than philosophical speculation.

He wrote prolifically: twenty-four volumes of commentary on "the Gospel" (likely an early gospel tradition), a collection of Odes, and what was called the Gospel of Basilides — none of which survives. What we know comes through hostile but detailed accounts: Irenaeus's Against Heresies (c. 180 CE), Hippolytus's Refutatio (c. 230 CE), and Clement of Alexandria's fragments in the Stromateis. Irenaeus and Hippolytus give versions that seem at times to contradict each other — a sign of either genuine doctrinal evolution within the Basilidean school, or the distortions of polemical reporting.

His son Isidore continued the school's teaching and wrote on ethics and exegesis — providing some of the clearest glimpses into what a Basilidean practice actually looked like. The school persisted in Egypt for at least two centuries after Basilides, with January 4th observed as a night-long festival marking the baptism of Jesus — a date significant because 365-heaven cosmology locates the descending Christ at a specific zodiacal position.

The Non-Existent God — The Most Radical Apophasis

At the summit of Basilidean cosmology stands a principle so transcendent that even the categories of being and existence cannot be applied to it. Hippolytus reports: "There was a time when there was nothing. Not even the nothing was there. The nothing in its simplest meaning — to say not even this."

Basilides calls this the Non-Existent God (ouk ōn theos) — literally the not-being God. This is not nihilism; it is the most radical possible negative theology. The Basilidean logic runs: any positive predicate you apply to the ultimate — "being," "substance," "will," "mind" — projects human or cosmic categories upward, contaminating the absolute with the conditioned. To truly speak of the source, you must strip even existence away. Only then does the term "God" refer to something actually beyond the world rather than to the world's highest known principle dressed in divine garb.

This move — technically called apophatic theology or via negativa — has deep structural resonances across traditions. It appears in Kabbalistic descriptions of Ain (Nothing), Ain Soph (Endless Nothing), and Ain Soph Or (Endless Light of Nothing) — three negations before the first positive emanation. It appears in Plotinus's One, which Plotinus insists cannot properly be said to "be" or even to "think." It appears in the Tantric concept of Nirguna Brahman (the attributeless Absolute). What is remarkable about Basilides is that he articulates this position two generations before Plotinus formalized it philosophically, and within a specifically Christian-Gnostic framework where the "Father of Jesus" is identified with this radically unknowable non-being.

The 365 Heavens — The Cosmic Architecture

From the Non-Existent God, "as a seed contains the whole tree," a primordial seed was projected — containing all possibility. From this seed emerged three tiers of Sonship (divine filiation) and, descending further, 365 heavens stacked above our world. Each heaven has its own ruler, its own angelic orders, its own character. The total number — 365 — is not arbitrary. It encodes the solar year, the complete cycle of cosmic time, the totality of the created world's temporal structure.

Our world sits at the bottom of this stack, governed by the ruler of the lowest heaven — the God of the Jewish scriptures, whom Basilides identifies not as evil (he is not the Valentinian Demiurge in that sense) but as ignorant of what is above him. He rules in good faith, not knowing that 364 heavens and a Non-Existent God exist above his reach. The problem is not malice but limitation — cosmic parochialism dressed as monotheism.

The structure is more complex than simple stacking. Each heaven contains angelic powers organized in elaborate hierarchies. Basilides names the ruler of the highest visible heaven as Abraxas — and around this name his entire numerological structure turns.

ABRAXAS — The Solar Cipher
Greek isopsephy · each letter = its gematria value · total = 365
Α
Alpha
1
Β
Beta
2
Ρ
Rho
100
Α
Alpha
1
Ξ
Xi
60
Α
Alpha
1
Σ
Sigma
200
1 + 2 + 100 + 1 + 60 + 1 + 200 = 365
The name ABRAXAS (also spelled ABRASAX) is a seven-letter divine name whose Greek numerical values sum to 365 — the number of days in a solar year and the number of heavens in the Basilidean cosmos. This is not coincidence; it is the operative logic of Gnostic numerology. The name of the ruling power encodes the structure of the cosmos it governs. Abraxas gems — carnelian and jasper amulets inscribed with the lion-headed, serpent-legged deity holding a whip and shield — are among the most common Greco-Egyptian magical objects surviving from antiquity.

The Three Sonships — Levels of Divine Filiation

Hippolytus preserves a sophisticated Basilidean account of three tiers of Sonship (huiotes) that emanate from the primordial seed before the 365 heavens are generated. This triadic structure is one of the most structurally elegant elements in early Gnostic thought.

The First Sonship is the most refined: pure, subtle, incorporeal — it leaps upward to the Non-Existent God instantly, "like a wing on a wing or breath on breath," requiring no effort, no time. It is the divine that knows itself immediately.

The Second Sonship is coarser. It too ascends, but requires assistance — it rises on the "Holy Spirit" as on a wing, which carries it upward to the Non-Existent God. But the Holy Spirit itself cannot enter the fullness; it remains at the boundary, having fulfilled its function as vehicle, like a jar that carries water to its destination and then sits empty at the door.

The Third Sonship — the one that requires purification and return — is the divine element mixed into matter: the pneuma within humanity. It is the Sonship that has not yet ascended. The entire cosmic process — all 365 heavens, all history, the coming of the Christ-power — is organized around the eventual return of this Third Sonship to the Non-Existent God. When that return is complete, divine Ignorance (agnōsia) will descend over the lower orders so they do not mourn their loss — a detail of profound cosmological mercy.

Sonship
Nature and Function
First SonshipMost subtle · immediate
The purest, most refined portion of the primordial seed. Rises instantly to the Non-Existent God at creation — "like a wing on a wing." Already in the Fullness. It is the divine self-knowing aspect of the cosmos.
Second SonshipCoarser · needs a vehicle
Rises to the Non-Existent God via the Holy Spirit as carrier-wing. The Spirit brings it to the boundary of the Fullness, then remains outside — like a vessel that delivers its contents and waits at the threshold, between the worlds.
Third SonshipEntangled in matter · must be redeemed
The divine spark mixed into the lower cosmos — the pneuma within each human being. Requires the entire cosmic drama (the Christ-power descending through all 365 heavens, illuminating each Archon) to liberate it. The goal of the Great Work: return of the Third Sonship to the Non-Existent God.

The Christ — A Light Passing Through All 365 Heavens

Basilides's Christology is one of the earliest and most precise elaborations of the descending-and-ascending savior pattern. The Christ is not born into matter in the orthodox sense. Rather, the power of the Non-Existent God descends through all 365 heavens sequentially — illuminating each level's ruler with gnōsis of what is above, liberating the divine element at each tier — until it reaches the lowest heaven and then the world of matter.

Each Archon along the way must be awakened to its own divine origin and its ignorance of what lies above. The descent is simultaneously a liberation: every angelic order receives its portion of gnōsis as the Christ-power passes through. By the time the light reaches our world, it has illuminated the entire cosmos from top to bottom. Jesus of Nazareth is the human point of contact for this descending power — not God incarnate in the orthodox sense, but the vehicle through which the Non-Existent God's salvific light reaches the Third Sonship trapped in matter.

The crucifixion, in Basilides's account, involves a docetic substitution: Simon of Cyrene, compelled to carry the cross, is swapped with Jesus — who stands nearby, laughing. This is not cruelty but cosmological precision: the divine Christ-power cannot suffer death; only the human form (which was not the true Christ) is crucified. The laughing Jesus is the pneumatic insight: the apparent tragedy is the operating system of a liberation the world cannot see.

Metempsychosis — The Attached Spirit and the Transmigrating Soul

Clement of Alexandria preserves a distinctive Basilidean doctrine of the soul that diverges sharply from Valentinus. Basilides posited what he called an attached spirit (prosphyès pneuma) — foreign spiritual elements that cling to the soul like barnacles, each with its own desires and tendencies, creating the experience of inner conflict, moral complexity, and the sense of having "multiple selves" within one person.

These attached elements are the psychic residues of previous incarnations. Basilides accepted transmigration of souls — metempsychosis — as a structural feature of the cosmos: the soul moves through multiple lives in the 365-heaven system, accumulating or shedding these attached spirits, until the Third Sonship within it is sufficiently purified to ascend. Suffering in this life is not punishment — it is the "natural working out" of the attached spirit's karma, the soul processing what it has taken on from other lives.

This doctrine of attached spirits gives Basilides a sophisticated psychological framework that resonates with Tantric accounts of vāsanās (karmic impressions), the Kabbalistic concept of ibbur (spirit-attachment), and Jungian psychology's notion of autonomous complexes operating within the psyche as sub-personalities.

Cross-Tradition Correspondences

Basilidean Gnosticism
The Non-Existent God
The utterly transcendent source — so beyond all categories that even "existence" cannot be predicated of it; the most rigorous apophatic theology in the Gnostic corpus, appearing a century before Plotinus formalizes the via negativa
Kabbalah
Ain — Pure Negation
The first of three veils before Kether: Ain (Nothing), Ain Soph (Endless Nothing), Ain Soph Or (Endless Light of Nothing) — three layers of negation identical in structure to Basilides's non-predication; both refuse to let the Absolute become a "thing"
Neoplatonism
The One — Beyond Being
Plotinus's One cannot properly be said to "be," to "think," or to "will" — predicating anything limits the unlimited; the Basilidean Non-Existent God is the earliest articulation of this philosophical move within a Gnostic-Christian framework
Tantra / Vedanta
Nirguna Brahman
Brahman "without qualities" — the absolute that transcends even the predication of being, consciousness, and bliss (sat-chit-ananda are themselves limiting descriptions); the apophatic core of Advaita as the Eastern parallel to Basilides's Non-Existent God
Basilidean Gnosticism
365 Heavens — Solar Architecture
365 heavens corresponding to the solar year, each governed by an Archon; the number encodes cosmic time-structure in spatial form; the name ABRAXAS numerically sums to 365, making the divine name the key that unlocks the architecture
Kabbalah
Sephirot as Emanated Structure
Ten Sephirot as the mapped structure of divine self-disclosure; the Basilidean 365 heavens and Kabbalistic Tree both posit an ordered emanated architecture between the transcendent source and material creation; the number of levels differs, but the logic is identical
Hermetic / Astrological
Planetary Spheres as Ascent Obstacles
The Hermetic soul-ascent (Poimandres, Corpus Hermeticum I) passes through seven planetary spheres, shedding vices at each; Basilides expands this to 365 levels, but the logic — cosmic password system, graduated liberation — is identical
Enochian / Merkabah
Heavenly Palaces (Hekhalot)
The Jewish mystical tradition of ascending through seven (or more) heavenly palaces, each guarded by angelic powers requiring proper seals and names; the Basilidean 365-heaven ascent is the Gnostic elaboration of the same structural map
Basilidean Gnosticism
Three Sonships — Tiers of Filiation
Immediate-subtle, vehicle-carried, and entangled-in-matter: three levels of the divine's relationship to its own source, from pure identity to complete self-forgetting; the cosmic drama is the return of the third tier to the first
Kabbalah
Neshamah / Ruach / Nefesh
Three soul-levels corresponding to Basilides's three Sonships: neshamah (divine breath, immediate connection to Ain Soph), ruach (emotional-intellectual self, needs cultivation), nefesh (vital animal soul, entangled in matter); the structure of the return is identical
Tantra (Vajrayana)
Trikāya — Three Buddha Bodies
Dharmakāya (pure emptiness-awareness, instant recognition), Sambhogakāya (subtle form-body, requires a vehicle), Nirmānakāya (gross manifestation, fully embedded in matter); the Basilidean three Sonships are the Gnostic Trikāya
Neoplatonism
The One / Nous / Soul
Plotinus's three hypostases: The One (immediate self-luminosity), Nous (self-thinking thought, needs the One as reference), World-Soul (dispersed in matter and time); Basilides's three Sonships anticipate this triadic architecture
Basilidean Gnosticism
Prosphyès Pneuma — Attached Spirits
Foreign spiritual elements that cling to the soul from previous incarnations, creating the experience of multiple inner voices, moral conflict, and alien desires; the psychic residues of transmigration
Kabbalah
Ibbur — Spirit Attachment
The attachment of a foreign soul to a living person, either for the soul's benefit (to complete an unfinished task) or to assist the living person; structurally parallel to Basilides's attached spirits; the Kabbalistic version includes the dybbuk (malevolent attachment)
Tantra
Vāsanās — Karmic Impressions
Subtle psychic residues deposited by past-life actions and experiences, shaping current tendencies, desires, and aversions; the Tantric mechanism behind the attached spirits Basilides describes — both posit multi-life psychic accumulation as the problem to be resolved
Depth Psychology
Autonomous Complexes
Jung's concept of complexes as autonomous psychic sub-personalities with their own drives, moods, and "voices" that operate within the ego without its consent; the phenomenological description of what Basilides called attached spirits — both explain why "I" is not a unity