realistically only by imagining ourselves in the plane, so that we
surround the point from all sides, with the distance between us and the
point diminishing gradually. Since we remain all the time on the
surface, we have no reason to conceive any change in its original
position; that is, we continue to think of it as an all-embracing plane
with regard to the chosen point.

The only way of representing the sphere diagrammatically, as a unit
bearing in itself the character of the plane whence it sprang, is as
shown in Fig. 9, where a number of planes, functioning as tangential
planes, are so related that together they form a surface which
possesses everywhere the same distance from the all-relating point.

Since Point and Plane represent in the realm of geometrical concepts
what in outer nature we find in the form of the gravity-levity
polarity, we may expect to meet Radius and Sphere as actual formative
elements in nature, wherever gravity and levity interact in one way or
another. A few observations may suffice to give the necessary evidence.
Further confirmation will be furnished by the ensuing chapters.

The Radius-Sphere antithesis appears most obviously in the human body,
the radial element being represented by the limbs, the spherical by the
skull. The limbs thus become the hieroglyph of a dynamic directed from
the Point to the Plane, and the skull of the opposite. This indeed is
in accord with the distribution in the organism of the sulphur-salt
polarity, as we learnt from our physiological and psychological
studies. Inner processes and outer form thus reveal the same
distribution of poles.

In the plant the same polarity appears in stalk and leaf. Obviously the