Since the range of beliefs, values, and rituals related to supernatural beliefs and events is enormous, it is obvious, as Durkheim observed long ago, that no belief, value, or ritual is intrinsically identifiable as “religious.” Since the “religious,” on the contrary, is a quality capable of being attached to almost any instance of these three dimensions of religious systems, the latter, to use a modern idiom, are in large measure projective systems. It is this characteristic of religion that poses a problem which has long confronted its students, and which comprises the problem of this chapter: If religious systems are indeed projective in character, how can we be sure that religious behavior is not abnormal behavior, requiring psychiatric, rather than sociocultural, analysis?