God of philosophers v. God of Abraham.
Rational accounts of God can only conclude to a sort of thing, and one can’t speak or relate to sorts of things.
Or this: rational theology is one way of relating to an object that demands another way of relating to it. A paternity test might declare that you are a father, but the proper response to this is not a continued scientific inquiry into your genetic similarities with your child. Some shift from third to second person is necessary.