Schopenhauer has put the point with his usual picturesqueness. Outward nature presents nothing but a play of forces. At first, however, this force shows merely the mechanical phenomena of pressure and impact, and its theory is sufficiently described by mathematical physics. But in the process of nature force assumes higher types, types where it loses a certain amount of its externality(76), till in the organic world it acquires a peculiar phase which Schopenhauer calls _Will_, meaning by that, however, an organising and controlling power, a tendency or _nisus_ to be and live, which is persistent and potent, but without consciousness. This blind force, which however has a certain coherence and purposiveness, is in the animal organism endowed with a new character, in consequence of the emergence of a new organ. This organ, the brain and nervous system, causes the evolution into clear day of an element which has been growing more and more urgent. The gathering tendency of force to return into itself is now complete: the cycle of operation is formed: and the junction of the two currents issues in the spark of sensation. The blind force now becomes seeing. But at first—and this is the point we have to emphasise—its powers of vision are limited. Sensibility is either a local and restricted phenomenon: or, in so far as it is not local, it is vague and indefinite, and hardly entitled to the name of sensibility. Either it is a dim, but far-reaching, sympathy with environing existence, and in that case only so-called blind will or feeling: or if it is clear, is locally confined, and at first within very narrow limits. Neither of these points must be lost sight of. On the one hand feeling has to be regarded as the dull and confused stirring of an almost infinite sympathy with the world—a pulse which has come from the far-distant movements of the universe, and bears with it, if but as a possibility, the wealth of an infinite message. On the other hand, feeling at first only becomes real, in this boundless ideality to which its possibilities extend, by restricting itself to one little point and from several points organising itself to a unity of bodily feeling, till it can go on from thence to embrace the universe in distinct and articulate comprehension.