no God behind God
In my gift-ontology, “no God behind God” is the rule that there is no deeper unity-maker, substrate, or impersonal deity beneath Father, Son, and Spirit. Whatever is really in God is God, and God is already triune in personal subsistence. This rule blocks a common misreception of classical metaphysics where one first posits a generic “God” as pure being and only later adds personal differentiation as an overlay. This approach refuses that layering. The one act is already from the Father, through the Son, in the Spirit. “No God behind God” also blocks any attempt to treat relations as accidents inhering in a substrate. If relations were accidents, then something deeper than the persons would bear them. The rule says that cannot be.
Another way to think of this, is like an anti-substrate rule: one should want to deny that God is an underlying subject that has properties and relations in the creaturely way. It denies that there is a bearer plus determinations structure in God, whether those determinations are attributes or relations. Under simplicity, there is no metaphysical layering in God, and no internal assembly. Therefore relations of origin cannot be accidental add-ons; they must be subsistent, identical with the one divine essence, while remaining really distinct by relational opposition. Anti-substrate is also a methodological rule: do not let conceptual convenience sneak in a unity-maker behind God.