152. What the retrogression of numbers into 0 is, that is the gravity in the sphere. The gravity is a geometrical reduction of position unto nothing. The sphere is only produced by _action_, and that indeed by the centroperipheric. This action must therefore manifest itself in two ways, as centrifugality and centripetality. The first is the dispersion of the primary act or of points, the second is the collection of the primary acts or points into the unity, and this is gravity. Centrifugality originates only in a constrained manner or with reluctance, for the primary act always seeks the centre, and only moves towards the periphery, because it has no longer any place there. If centripetality be regarded as a force, then is centrifugality no force, but only centripetality itself retreating from the centre; even as cold and darkness are probably no particular forces in themselves, but only weaker degrees of heat or light. 153. Gravity is not motion simply, but motion unto a centre, unto rest. 154. That which is itself in the very centre is therefore not heavy. The primary act is not heavy. 155. As all finite things are positions of the primary act in the sphere out of the centre, so are all of them heavy. Gravity is the force that strives unto the centre, and which is there impeded by other forces already present therein. A finite thing, that is not heavy, is a contradiction. The gravity of the single thing is weight. The world itself has no weight, or else it must be heavy in relation to something else without it. The ideas of gravity and weight, as we speak of them in reference to individual things, are not applicable to the world, still less to God. 156. Gravity is also nothing new in the world, but it is only the positing of the centre in space. As necessarily as the Eternal, when it manifests itself, must appear under a definite form, so also must it be necessary with the eternal effort, to return into itself or appear as gravity. Gravity is nothing different from the primary act, nothing specially created; but the spherical position of the same tending unto the centre. 157. Now, as the sphere has originated out of nothing, so also has gravity originated out of the same. The form is a formed nothing: the form is, however, no form without internal forming force, and to this gravity belongs. The being of form and the being of gravity are one. Gravity is a weighty nothing, a heavy essence, striving towards centre, a realization of the first divine idea. Gravity cannot, therefore, be perceived in the universe as a whole, but only in its parts. 158. If gravity is the primary act that has become real, so must everything originate out of gravity, or everything must acknowledge gravity to be the common mother of the finite. It is in all cases, or in every individual thing, only the gravity, the Ponderose, which exists, otherwise nothing exists; for verily nothing exists without the divine primary, which is incessantly a central, act.