The absence of the moon in the Mithras Liturgy, then, provides clues to the cosmological perspectives both of the creator of the spell itself and of the redactor who compiled the Great Paris Magical Papyrus. In the cosmologies of other theurgic systems, the powers of "genesis" are a necessary part of the cosmic order, and the moon serves as a helpful intermediary for those seeking contact from the material world to the realms above. In the Mithras Liturgy, by contrast, the ambivalent position of the moon as intermediary in other cosmologies is interpreted in a more negative sense, since this ruler of "genesis" must be absent for the apogenetic ritual to succeed. Although the surviving evidence for Mithraism does not present a particularly negative picture of the moon and "genesis" (apart from the obvious fact that Mithras slays the lunar bull), the redactor of the Great Paris Magical Papyrus found in the Mithras Liturgy a scenario that could be fit within more pessimistic views of the moon and "genesis." Throughout the papyrus, the moon is a hostile power, trapping souls in "genesis" through hostile "daimones" and the chains of fate. This power can be coerced into assisting in violent magic, but it must be kept as far as possible from an enterprise that aims at "apogenesis." The magician's preparations and ascent to the Great God Mithras, therefore, must take place when the moon is entirely absent from the sky, at the seizure of the moon.
At the Seizure of the Moon: The Absence of the Moon in the Mithras Liturgy by Radcliffe G Edmonds III in “Magic in History: Prayer, Magic, and the Stars in the Ancient and Late Antique World” edited by Scott Noegel, Joel Walker, and Brannon Wheeler (p 238-9)