The first problem with negative theology is that, if God is described solely in terms of negation,
it is impossible to distinguish him from non-existence—“any Being which had to be characterized
entirely in negations would, surely, not be discernible from no Being at all.” God is not matter;
neither is non-existence. God does not have limitations; neither does non-existence. God is not
visible; neither is non-existence. God does not change; neither does non-existence. God cannot be
described; neither can non-existence. And so on down the list of negative predicates. If the theist
wishes to distinguish his belief in God from the belief in nothing at all, he must give some positive
substance to the concept of God