Orthopraxy Requires Orthodoxy
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?