The Oracles circulated as hexameter verses attributed to Julian the Theurgist and his father Julian the Chaldean, working under Marcus Aurelius in the 2nd century CE. No complete text survives; the fragments are preserved by Proclus, Damascius, Psellus, and other Neoplatonists. Ruth Majercik's edition and translation (1989) is the standard modern source.
The Oracles teach a triadic cosmos, the empyrean, ethereal, and material realms, ruled by the Father, the mediating Power (Hecate), and a second Mind, with the soul's ascent achieved through theurgic ritual rather than contemplation alone. This map structured Proclus's theology and, centuries later, the Golden Dawn's reading of them.
The Oracles' scandal for philosophy is their claim that ritual, not dialectic, saves: the gods command material rites, and the soul ascends by performing them. Iamblichus's De Mysteriis is the philosophical defense of this position against Porphyry's rationalism.
If a scripture exists only in fragments cited by its believers, what did the whole say?