Aquinas offers a very compelling account of how to reconcile the transcendence of God with His immanence. This reconciliation is most compelling because Aquinas claims that God is most transcendent from, and most immanent in, creation for the very same reason, i.e. because God is
Ipsum esse subsistens (Subsistent Act of Existing Itself).
According to Aquinas, all creatures are fundementally composed of
essence and existence. He argues that because one can know the essence of a created thing, i.e. what a thing is, without thereby knowing anything about whether it exists in reality, essence differs from existence. Thus, every created thing is a composition of what it is and an act of existing whereby it is a real, actual thing. (For more on this, see
On Being and Essence, Chapter 4.) This act of existing,
esse, is sometimes refered to as that feature about things that makes them something rather than nothing, or real as opposed to imagined. (I don’t think that these ways of speaking are enough to prove the reality of the distinction, but they illustrate the point.) Since every creature is a composition of essence and
esse, there must be a First Cause of this composition that is Himself uncomposed. In God there is no distinction between What He is, i.e. His Essence, and the act wherby He is.
(Summa Theologiae Ia, 3, 4) ***Thus, because God is utterly simple, and not composed, and utterly perfect, he utterly transcends every creature. ***
However, since no creature exists through itself of itself, every creature is continually kept in existence through continual active causality of God. God is the cause of the being of all things precisely because He is Subsistent Being Itself (
ipsum esse subsistens) Now, since God is being itself by His own essence, created being must be his proper effect…Therefore, as long as a thing has being, so long must God be present to it, according to its mode of being. But being is innermost in each thing and most fundementally present within all things… Hence it must be that God is in all things and innermostly.
(S.T. Ia, 8, 1) Hence, by one and the same principle, that God is “impsum esse subsistens,” Aquinas is able to claim that God is at once most trancendent, and infinitely so, from creatures, and that God is most immanently active in his creation. Although God, as Aquinas conceives him philosophically, is utterly Other than his creation (as the Judeo-Christian tradition maintains) He is no Divine Watchmaker, who set the cosmos running but has no further connection with his creation. ***Rather, for Aquinas, God is “innermostly” present precisely because He is utterly Other. ***
But with all this talk of God being “ipsum esse subsistens,” Aquinas believes that we should be on guard against two mistakes.
First, that God’s transcendence means that He is utterly unknowable. Aquinas’ claim that God is utterly transcendent is a conclusion and corollary of arguments that all things are caused by God.