Up to this point the world is what is called an external, which is here taken to mean (not a world external to the individual, but) a self-externalised world. That is to say, it is the observer who has hitherto by his interpretation of his perceptions supplied the “Spirit in Nature.” In itself the external world has no inside, no centre: it is we who read into it the conception of a life-history. We are led to believe that a principle of unity is always at work throughout the physical world—even in the mathematical laws of natural operation. It is only intelligible and credible to us as a system, a continuous and regular development. But that system is only a hypothetical idea, though it is held to be a conclusion to which all the evidence seems unequivocally to point. And, even in organic life, the unity, though more perfect and palpable than in the mechanical and inorganic world, is only a perception, a vision,—a necessary mode of realising the unity of the facts. The phenomenon of life reveals as in a picture and an ocular demonstration the conformity of inward and outward, the identity of whole and parts, of power and utterance. But it is still outside the observer. In the function of sensibility and sentiency, however, we stand as it were on the border-line between biology and psychology. At one step we have been brought within the harmony, and are no longer mere observers and reflecters. The sentient not merely is, but is aware that it is. Hitherto as life, it only is the unity in diversity, and diversity in unity, for the outsider, i.e. only implicitly: now it is so for itself, or consciously. And in the first stage it does not know, but feels or is sentient. Here, for the first time, is created the distinction of inward and outward. Loosely indeed we may, like Mr. Spencer, speak of outward and inward in physiology: but strictly speaking, what Goethe says is true, _Natur hat weder Kern noch Schaale_(73). Nature in the narrower sense knows no distinction of the inward and outward in its phenomena: it is a purely superficial order and succession of appearance and event. The Idea which has been visible to an intelligent percipient in the types and laws of the natural world, now _is_, actually is—is in and for itself—but at first in a minimum of content, a mere point of light, or rather the dawn which has yet to expand into the full day.