The God of classical
theism -- of Athanasius and Augustine, Avicenna and Maimonides, Anselm and
Aquinas -- is (among other things) pure actuality, subsistent being itself,
absolutely simple, immutable, and eternal.
Critics of classical theism sometimes allege that such a conception of
God makes of him something sub-personal and is otherwise incompatible with the
Christian conception. As I have argued
many times (e.g. here,
here,
here,
and here)
nothing could be further from the truth.
In fact, to deny divine simplicity or the other attributes distinctive
of the classical theist conception of God is implicitly to make of God a
creature rather than the creator. For it
makes of him a mere instance of a kind, even if a unique instance. It makes of him something which could in
principle have had a cause of his own, in which case he
cannot be the ultimate explanation of things. It is, accordingly, implicitly to deny the
core of theism itself. As David Bentley
Hart writes in The Experience of God
(in a
passage I had occasion to quote recently), it amounts to a kind of “mono-poly-theism,” or indeed to atheism.
But it is not only generic theism to which the critics of classical
theism fail to do justice. It is Christian
theism specifically to which they fail to do justice. One way in which this is the case is (as I
have noted before, e.g. here)
that it is classical theism rather than its contemporary rival “theistic
personalism” that best comports with the doctrine of the Trinity. But to reject classical theism also
implicitly trivializes the Incarnation, and with it Christ’s Passion and Death.















