III. The World that Underlies the Senses
A further consideration shows that the supersensible activity revealed in the structure of the sense organs works in different ways. In the three spheres of the sense of life, the sense of self-movement and the sense of equilibrium, the activity starts from within the human body and manifests itself within the limits of the skin. This kind of activity is also present in the senses of smell, taste, sight, warmth and hearing; but it is joined by another, which must be said to proceed from the outside inward. The organ of hearing, for example, is a member of the human organism. Within this organism, the forces must be at work that shape this organ in accordance with the nature of the body as a whole. From the outside, however, the hidden supersensible forces in the world of sound must come together, forming this organ in such a way that it is receptive to sound. In the case of the five sense organs mentioned, an encounter of forces is thus indicated on the surface of the human body, as it were: forces act in the direction from the inside of the body outwards and shape the individual sense organs according to the nature of the whole organism; the forces that meet them come from the outside inwards and shape the organs in such a way that they adapt to the various manifestations of the external world. In the case of the senses of life, self-movement and equilibrium, only one of these two directions, the one striving from the inside outwards, is present. It further follows that in the case of the senses of speech and of concepts, the direction from the inside outwards does not apply, and that these senses are built into the human being from the outside in. For these senses, therefore, the supersensible activity as characterized reveals itself in such a way that it already approaches the inner life of the soul in terms of its formation. Insofar as we must also see the 'I' predisposed in the above-characterized way in the supersensible forces that build up the senses, we can say that in the 'I' these forces betray their own nature most of all. Only that this essential nature is, as it were, concentrated in a point in the 'I'. If we observe the 'I', we find in it a nature that is spread out in the most abundant profusion in a supersensible world and reveals itself out of this only in its effects, in the building of the senses. In this respect, too, the sense of touch presents itself as the opposite of the 'I'. In the sense of touch, that part of the supersensible world (or, if you will, the extra-sensible world) is revealed that cannot become an inner experience of the human being, but is accessed through corresponding inner experiences.