163. It is an illusion to believe that matter were an actual something subsisting in itself. It is even so with numbers, upon which a reality also is bestowed, when they are still demonstrable nothings. A number is nothing truly than an affirmation several times repeated, a reiterated deposition of what is nothing, what is no number. This deposition happens likewise in the universe, where it is the primary act, that is deposited. Where, however, this is, no other station can occur. This exclusive property is usually called the _Impenetrable_, the _Material_. It cannot be said in what spot matter arises, so secretly and suddenly does it start into existence. It is matter properly at the first manifestation of being, of time and of space; for at the same instant also the line, surface, density and gravity have been given. The line does not exist if it does not _act_; the sphere does not exist if it be not inert, i. e. if its forces do not strive towards the centre, and consequently to connexion. Nothing exists if it is not material. Matter is accordingly coexistent with the presence of God. 164. The Immaterial does not exist; for even the Material which is _not_, is the Immaterial. Everything that is, is material. Now, however, there is nothing that is not; consequently, there is everywhere nothing immaterial. Immateriality is only a postulate principle, by which to get at matter, like the 0 in mathematics, which is nothing in itself, does not even exist, but that still must be posited, in order that numbers may bear a reference to it. 165. God only is immaterial; he is the only permanent immaterial invention, and the axiom being the Formless, Polarless, Timeless. A spirit with form is a contradiction. But the matter also does not exist, because matter is nothing, because it is only a sphere of central actions, which is gravity. 166. The material universe is called nature. There can be only _one_ nature, as well according to time as to space and to divine animation. There is only one God, whose operations expressed, or materially posited, are nature. Nature has originated out of nothing like time and space; or with these has nature also been. God has made heaven and earth out of nothing. 167. God has not found matter co-eternal with himself, and, like an architect, arranged this to his fancy; but he has, out of his own eternal omnipotence, by his will simply, evoked the world out of nothing unto existence. He has thought and spoken, and it was. 168. The doctrine of matter is the Philosophy of Nature. It is therefore the science also of all Singulars, like geometry and arithmetic; thus at bottom is only the third part of mathematics, and is even as certain and demonstrable as this. ÆTHER.