Thus immediately within himself does man have a continuous, uniquely vivid experience of the One and the Many, and of the necessity, difficulty, and fruitfulness of their proper organization; and from hence he will reflect them back upon the outer world, adding thus indefinitely, by means of Ethics, to the delicacy and depth of his apprehension of such Oneness and Multiplicity as, by means of Dialectics, he has already found there. But further, he now thus becomes conscious, for the first time at all adequately, of the difference between his own body and his own mind. And here he has no more a Oneness _and_ a Multiplicity, he is directly conscious of a Oneness _in_ Multiplicity, of a ruling and organizing power of the mind in and over the body; and the One here is unseen and spiritual, and the Many is here found to be an organism of forces and of functions designed, with profound wisdom, to correspond with and to subserve the soul. And this Microcosm is readily taken as a key and an analogy wherewith to group and explain the appearances of the world without. Much appears in that outer world as unreduced to system; but then similarly within us much is still in a state of chaos, of revolt. In that world no one ruler can be directly perceived; but then similarly within us, the one ruling mind is perceptible only in its effects. And this inner organization, ever required more than realized, is not a matter of abstract speculation, of subtle induction, adjournable at will; it is a clamorous consciousness, it is a fact that continually requires acts to back it or to break it. Strengthen it, and you have interior expansion and life; weaken it, and you bring on shrinkage and death. For the passions are there, active even if _we_ refuse to be active, active against us and above us, if not under us and for us; and their submission to the reason, to effort, cannot fail, once our attention is fully turned that way, more than anything else to keep alive and to deepen our sense of the organization of all that lives, of the presence of the One _and_ the Many, of the One _in_ the Many, in all that truly lives at all. 3. _In Plato._ Now this dialectical method and this ethical subject-matter get applied, investigated, and developed, with ever-increasing complexity and interaction, by Socrates, Plato, and Aristotle, the three spiritual generations of this, the greatest period of Greek Philosophy. And the more penetrating the method becomes, and the more deeply it probes the subject-matter, the more intense and extensive is found to be this Unity in Multiplicity both within man and without him.