It is shown that sound Christian theology requires belief in a young universe. For, to suppose a Creation untold ages ago is really to dismiss the notion of Creation, as a serious matter; and to do that, in turn, is to play down, and eventually ignore or deny, the difference between the Creator and His Creation. Thus doctrines which, for euphemism, may be called progressive creation, for instance, but which, in everything which matters, are really a form of evolution, are almost certain to lead into some vague deism, and thence into either agnosticism or pantheism.