Thus the world in which we live is in its whole nature through and through _will_, and at the same time through and through _idea_. This idea always pre-supposes a form, object and subject. If we take away this form and ask what then remains, the answer must be that this can be nothing but _will_, which, properly speaking, is the _thing in itself_. Every human being discovers that he himself is this will, and that the world exists only for him does so in relation to his consciousness. Thus each human being is himself in a double aspect the whole world, the microcosm. And that which he realizes as his own real being exhausts the being of the whole world, the macrocosm. So, like man, the world is through and through _will_, and through and through _idea_. Plato would say that an animal has no true being, but merely an apparent being, a constant becoming. The only true being is the Idea which embodies itself in that animal. That is to say, the Idea of the animal alone has true being, and is the object of real knowledge. Kant, with his theory of "the thing-in-itself" as the only reality, would say that the animal is only a phenomenon in time, space, and causality, which are conditions of our perception, not the thing-in-itself. So the individual as we see it at this particular moment will pass away, without any possibility of our knowing the thing-in-itself, for the knowledge of that is beyond our faculties, and would require another kind of knowledge than that which is possible for us through our understanding. Thus do these two greatest philosophers of the West differ. The thing-in-itself must, according to Kant, be free from all forms associated with knowing. On the contrary, the Platonic idea is necessarily object, something known and thus different from the thing-in-itself, which cannot be apprehended. Yet Kant and Plato tend to agree, because the thing-in-itself is, after all, that which lays aside all the subordinate forms of phenomena, and has retained the first and most universal form, that of the idea in general, the form of being object for a subject. Plato attributes actual being only to the Ideas, and concedes only an illusive, dream-like existence to things in space and time, the real world for the individual. _IV.--The World as Will. Second Aspect_ The last and most serious part of our consideration relates to human action and is of universal importance. Human nature tends to relate everything else to action. The world as idea is the perfect mirror of the will, in which it recognizes itself in graduating scales of distinctness and completeness. The highest degree of this consciousness is man, whose nature only completely expresses itself in the whole connected series of his actions.