reason—namely, the distinction between knowing Christianity to be true and showing Christianity to be true. It has been gratifying to me that what I grasped in a rough and superficial way has been confirmed by the recent work of religious epistemologists, notably Alvin Plantinga. The methodological approach which I shall defend in this essay is that reason in the form of rational arguments and evidence plays an essential role in our showing Christianity to be true, whereas reason in this form plays