The Gnostic Mass is a Thelemic liturgy written by Aleister Crowley and published as Liber XV. It is the central ceremony of Ecclesia Gnostica Catholica, the religious component of Ordo Templi Orientis.[1][2]

Officers and congregation#

The text assigns parts to a Priest, Priestess, Deacon, and two Children. A congregation also participates. The ceremony moves through opening declarations, the unveiling of the shrine, prayers, consecration, and communion. An altar, tomb, font, and other furnishings create its spatial structure.[1]

The creed and collects express a religious world that joins individual life, cosmic forces, and a line of sacred or initiatory figures. Egyptian divine names appear alongside the language of a church and Eucharist. This is Crowley's modern Thelemic composition, with its own selection and arrangement of symbols.

A communal Thelemic practice#

O.T.O.'s public explanation distinguishes the church's religious work from the order's initiation system. Public celebrations can provide a first encounter with Thelema for visitors, while other organizational activities have different conditions of participation.[2]

The title “Gnostic” should not be taken as a claim that the ceremony survives unchanged from an ancient community. The Mass belongs to modern Thelema, and its script is available for study. It differs from both the symbolic ceremonies discussed by the Church of Satan and devotional rituals addressed to Satan as a real deity. The actual liturgy supplies the best basis for comparison.

See also#

References

  1. Aleister Crowley, Liber XV: Ecclesiae Gnosticae Catholicae Canon Missae · Primary liturgical text. (accessed 2026-10-01) ↩
  2. O.T.O. U.S. Grand Lodge, About O.T.O. (accessed 2026-10-01) ↩
gnostic massthelemaliturgypractice

This encyclopedia covers traditions beyond the High Satanic Church. Church doctrine is identified as such when it appears.