If beauty is the criterion of religion, this view of the relation of religion to morality is justified. But what if there be the same difference in the beauty of two separate characters that there is between the mineral and the shell? What if there be a moral beauty and a spiritual beauty? What answer shall we get if we demand a more scientific distinction between characters than that based on mere outward form? It is not enough from the standpoint of biological religion to say of two characters that both are beautiful. For, again, no fundamental distinction in Science depends upon beauty. We ask an answer in terms of biology, are they flesh or spirit; are they living or dead? If this is really a scientific question, if it is a question not of moral philosophy only, but of biology, we are compelled to repudiate beauty as the criterion of spirituality. It is not, of course, meant by this that spirituality is not morally beautiful. Spirituality must be morally very beautiful--so much so that popularly one is justified in judging of religion by its beauty. Nor is it meant that morality is not _a_ criterion. All that is contended for is that, from the scientific standpoint, it is not _the_ criterion. We can judge of the crystal and the shell from many other standpoints besides those named, each classification having an importance in its own sphere. Thus we might class them according to their size and weight, their percentage of silica, their use in the arts, or their commercial value. Each science or art is entitled to regard them from its own point of view; and when the biologist announces his classification he does not interfere with those based on other grounds. Only, having chosen his standpoint, he is bound to frame his classification in terms of it. It may be well to state emphatically, that in proposing a new classification--or rather, in reviving the primitive one--in the spiritual sphere we leave untouched, as of supreme value in its own province, the test of morality. Morality is certainly a test of religion--for most practical purposes the very best test. And so far from tending to depreciate morality, the bringing into prominence of the true basis is entirely in its interests--in the interests of a moral beauty, indeed, infinitely surpassing the highest attainable perfection on merely natural lines.