The problem of the causality of the principle in Plotinus

The One is Principle of everything, but it is not part of that of which it is the Principle. There is a "break" at the origin of the emanation from the One. The apparition of the Intellect is an apparition against the background of a necessary separation from the Principle The generation of the Intellect by the One cannot be situated at all. It takes place by emanation, by radiation, and only images can suggest of explicitate its movement. The logical opposition between the One and being accordingly renders impossible three types of causality: "transitive", "participatory" and "immanent". A fourth category of causality might account satisfactorily for the generation of the Intellect by the One, namely "absolute" or "direct" causality. It is of interest because it condemns any other kind of causality. Nonetheless, "absolute" causality opens up a paradox. How should one think the radical transcendence One-being and at the same time save emanation? Absolute causality would be the meeting-point for a synthesis between a Platonic metaphysical heritage of separation and a more oriental "mystical" heritage, in which emanation from the principle guarantees a union or synthesis between the two terms. Plotinus situates himself between these two poles: their unity constitutes his uniqueness, between the East (continuity) and the West (separation). The problem of the causality of the Principle makes it possible for us to inquire into the twofold East-West heritage of Plotinus and the unifying character of his thought.