It is worse than useless for Christians to talk about the importance of Christian morality, unless they are prepared to take their stand upon the fundamentals of Christian theology. It is a lie to say that dogma does not matter; it matters enormously. It is fatal to let people suppose that Christianity is only a mode of feeling; it is vitally necessary to insist that is first and foremost a rational explanation of the universe. It is hopeless to offer Christianity as a vaguely idealistic aspiration of a simple and consoling kind; it is, on the contrary, a hard, tough, exacting, and complex doctrine, steeped in a drastic and uncompromising realism. And it is fatal to imagine that everybody knows quite well what Christianity is and needs only a little encouragement to practice it. The brutal fact is that...not one person in a hundred has the faintest notion what the Church teaches about God or man or society or the person of Jesus Christ.
Dorothy Sayers, Creed or Chaos?