To take an instance from common experience: a stranger, an unknown person, enters our circle. Instinct, working automatically and sensationally, may attract us powerfully towards such a person, with a steady, irresistible attraction. Intuition, on the contrary, uttering its revelation abruptly and with, so to speak, one sudden mysterious cry, may warn us of some dangerous quicksand or perilous jungle in such a stranger's nature of which instinct was totally ignorant because the thing was what might be called a "spiritual quality" lying deeper than those sensational or magnetic levels through which instinct feels its way. The instinct of animals or birds for instance warns them very quickly with regard to the presence of some natural enemy whose approach they apprehend through some mysterious sense-impression beyond the analysis of human reason. But when their enemy is the mental intention of a human being they are only too easily tricked. To take quite a different instance. It may easily happen that while conscience has habitually driven us to a certain course of action against which instinct has never revolted because of its preoccupation with the senses, some sudden flash of intuition reaching us from the hidden substratum of our being changes our whole perspective and gives to conscience itself a completely opposite bias. What these intermittent revelations of intuition certainly do achieve is the preservation in the soul's memory of the clear and deep and free and unfathomable margins of the ultimate mystery, those wavering sea-edges and twilight-shores of our being, which the austere categories of rational logic tend to shut out as if by impenetrable walls. It remains to consider the attribute of memory. Memory is the name which we give to that intrinsic susceptibility, implying an intrinsic permanence or endurance in the material which displays susceptibility, such as makes it possible for what the soul feels or what the soul creates to write down its own record, so that it can be read at will, or if not "at will," at least can be read, if the proper stimulus or shock be applied. Memory is not the cause of the soul's concrete identity. The soul's concrete identity is the cause or natural ground of memory. Memory is the "passive-active" power by means of which the concrete identity of the soul grows richer, fuller, more articulate, more complex and more subtle. In looking back over these eleven attributes of the "soul-monad," what we have to remark is, that two of the number differ radically in their nature from the rest. The attribute of emotion differs from the rest in the sense that it is the living substantial unity or ultimate synthesis in which they all move. It is indeed more than this. For it is the actual "stuff" or "material" out of which they are all, so to speak, "made" or upon which they all, so to speak, inscribe their diverse creations.