Scientists often fail to make the distinction between the analytic truths of their system, and the truths they have discovered by collecting and analyzing data. It took many years before social scientists accepted the fact that many of their certainties were merely a product of their model. In his psychiatric model Freud had managed to convince therapists that his model was somehow the only objective psychiatric truth. Suddenly the massive system of Freudian certainties became only one model among others. Social scientists of all kinds are now more comfortable with the idea of working with alternative models of sociology or psychology.
Theologians still find that difficult.
But this book has suggested that model theology is essential if we want to be honest and crystal clear about our theological differences. Philosophers have concluded that none of the proofs for the existence of God are convincing. Now we should add that in each religious or ideological system there are certainties about God or the denial of God. It therefore makes no sense to discuss a proof about God's existence except within a system. And in a Theistic system God is the Creator by definition.