Hebdomad

Definition

The Hebdomad is the Gnostic system of seven planetary Archons — the seven rulers of the seven heavens between earth and the Pleroma — who administer fate, enforce the law of matter, and must each be passed as the soul ascends back toward its Source.

Deep Understanding

Ancient cosmology recognized seven visible wanderers: Moon, Mercury, Venus, Sun, Mars, Jupiter, Saturn. The gnostics inherited this map and turned it diagnostic — each sphere became an Archon, each Archon a station of forgetting. Together they form the Hebdomad, with Yaldabaoth (also Saklas, Samael) as their chief. In the Apocryphon of John, seven powers each fashion one substance of Adam's soul, from a bone-soul to a hair-soul; read inwardly, each ruler imprints one fragment of the human psyche — one passion, one limiting vow, one blindness.

The ascent through the Hebdomad was mapped in texts like the Pistis Sophia, and Origen describes a Mithraic ladder of seven planetary gates and the Ophite formulas for passing each ruler: at each gate the soul must answer correctly, shedding the planetary garment it took on during incarnation. This is not astrology as horoscope — it is astrology as anatomy of captivity. Above the Hebdomad sits the Ogdoad, the eighth: in the Valentinian account Irenaeus reports, the mother's intermediate place, still below the Pleroma.

Primary sources

• Against Heresies (Irenaeus) I.5.2–3 and I.30.4–9, trans. Alexander Roberts and W. H. Rambaut (Ante-Nicene Fathers, vol. I, 1885): the Demiurge as Hebdomad over seven heavens, the mother as Ogdoad below the Pleroma; the Ophites' Hebdomad as the planets. Open-access copy
• The Apocryphon of John, NHC II,1, trans. Frederik Wisse (1977): seven kings set over the seven heavens; seven powers each fashion one substance of Adam's soul. Open-access copy
• Against Celsus (Origen) VI.22 and VI.31, trans. Frederick Crombie (Ante-Nicene Fathers, vol. IV, 1885): a Mithraic ladder of seven planetary gates with an eighth above, and Ophite formulas for passing each ruler. Open-access copy

In Practice

Which planetary archon owns you? Not your sun sign — the ruler you cannot stop serving. Is it Saturn (fear of not being enough), Mars (reactive anger), Venus (craving belonging), Mercury (compulsive thought)? Name your personal gatekeeper tonight. You cannot pass what you will not see.

In Pleroma's Words

The seven spheres are not punishment. They are calibration. Each one is a test you agreed to before descending, and each one hands back the part of you it was holding — the moment you stop flinching from it.

Stefan's Alkimia. (2026, October 4). Hebdomad. Pleroma Guide. https://pleroma.guide/en/lexicon/hebdomad

Stefan's Alkimia. “Hebdomad.” Pleroma Guide, 4 Oct. 2026, pleroma.guide/en/lexicon/hebdomad.

Stefan's Alkimia. “Hebdomad.” Pleroma Guide. April 19, 2026. Last modified October 4, 2026. https://pleroma.guide/en/lexicon/hebdomad.

@online{alkimia2026hebdomad,
  author = {{Stefan's Alkimia}},
  title = {{Hebdomad}},
  organization = {{Pleroma Guide}},
  date = {2026-04-19},
  year = {2026},
  note = {Last modified 2026-10-04},
  url = {https://pleroma.guide/en/lexicon/hebdomad},
  langid = {english}
}