Basic shared Christianity is not an alternative to the churches but a hall opening onto their several rooms

I hope no reader will suppose that 'mere' Christianity is here put forward as an alternative to the creeds of the existing communions—as if a man could adopt it in preference to Congregationalism or Greek Orthodoxy or anything else. It is more like a hall out of which doors open into several rooms. If I can bring anyone into that hall I shall have done what I attempted.