186. At that part of the universe where no periphery stands opposed to centre, no planet to the sun, the æther is not tense, but indifferent, annulled. There can thus only be columns of æther, which are rendered tense, namely, those columns of æther which are found between the sun and the planets. Near to the planets the æther is void of action, indifferent, non-apparent. There are consequently as many apparent æther-columns, as there are heavenly bodies, that stand in the process of polarity opposed to each other. These columns move with the planets around the suns. The indifferent æther of the world-space is, therefore, successively rendered tense, as the planets move around suns, and becomes again indifferent behind the planets.
187. But besides this, that columns of tension only exist, and therefore that the æther is nowhere active as a sphere, there is still no spot in the world-space where there would be only indifferent æther, nothing; for the æther consists of many globes of æther. There is thus nowhere an indifferent æther, consequently nowhere an empty space. The idea of the repletion of space is not that of the sphere, but of the columns of tension, which by their crossing in every direction form a sphere only externally.
188. That which is thought of as originally filling space is not the quiescent but only the moved, tensed æther. The former is the void space, the nothing.
189. The tension of æther is an action, which operates according to the line. This linear activity, which makes its exit from the central mass and is excited hence to the peripheral mass, is Light, or in short, light is tension of æther.
190. Light is a traction of lines or radial action; consequently an antetype of magnetism. A ray of light is a radius. The ray of light has two extremities different from each other; that turned towards the sun is 0, that which comes in contact with the planets is ±. Light is, therefore, a splitting, rending action.
191. Light is the life of the æther. Hitherto the æther was an inactive nothing, mere substratum for a future. This nothing, when it becomes centroperipheric, seeks to tear the mathematical point into radii and circumferences, appears; and this centroperipheric manifestation we call light.
192. The untensed, indifferent æther is, therefore, darkness, and this is the essence, the rest of æther. Chaos was thus darkness; the world arose out of darkness when light became. Light has originated out of darkness when the chaos was moved. Were it possible therefore for all light to vanish, the world would again return into its old nothing; for darkness and nothing are one. God has separated the light from the darkness.
193. If light be only a column of æther in a state of tension, light is or exists only between the planet and the sun; near to the planet and behind it is darkness. The primary sphere is a dark sphere, transpierced only by single rays of light. Each star, however, stands in a state of tension with another; thus many thousand rays of light stream forth from each, and fill out the world-space in all directions. There is therefore no absolute darkness, because there are infinitely numerous rays of light. In the night also there is always as much light present as is necessary to maintain the heavenly bodies in their action. For the world there is no night, but only for the planets. It will be shown that the air maintains its existence simply through the operation of light; were it therefore always dark, were night to endure for ever, the air must soon assume another composition or mixture, and everything that lives in it must fall to ruin. This is shown also by the diseases and crises of the same.
194. Light is from eternity, for the tense æther was from eternity. The dark chaos exists only as postulate. Light is time that has become real, the first manifestation of God; is God himself positing, is the dyadic God. The dyas is not merely radiality but light; or both are one, time and light are one, motion and light are one. When God numbers, when he draws lines, he thus creates light. God becoming self-conscious is light. Light is God illuminating. Darkness has accordingly never existed, although the light is derived from the darkness, like numbers and figures are out of nothing.
195. Light is no matter. There is no substance called light, but the æther is illuminant through its binary division. The sun does not, therefore, stream forth when it illumines the planets, and loses nothing of its magnitude; it is not to be feared that we shall ever lose it. That the sun is an undulating sea of flame, that it is throughout a volcano, that combustions or electrical processes of light, appearing to us as light, occur in its atmosphere; that the velocity of rotation hurls about the light-particles, and that these particles scattered in the world-space are, by an unknown route, or by means of comets, again brought back to the sun, are opinions unworthy the inquirer into nature. The sun gives out nothing but the impulse, not, however, the mechanical, which makes the space of heaven tremble upon which it shines; but the purely spiritual, as the nerves rule the muscle. The sun can never be extinguished, never become dark; for it gives out light, not as a fire, but simply by reason of its standing in the midst; its simple position, its enchainment to the planets is light. A fire upon the sun would not be perceived by us; it would not lighten nor warm us, because of its having no relation to us. The central relation of the sun toward us cannot, however, remain unobserved, and this observation is even that of light.