affected. Color therefore does not belong to the air, but subsists in itself; the air's only function is its presence. But enough of this. DOES THE WITHDRAWAL OF THE LUMINOUS SOURCE ABANDON THE LIGHT TO DESTRUCTION; OR DOES THE LIGHT FOLLOW IT? 7. It might be asked whether the withdrawal of the object from which light emanates abandons the light to destruction, or does the light follow the source into withdrawal? This question is related to the former one; (and it may be said that) if the light inhere in the illuminated body in a manner such as to have become characteristic of it, the light perishes with it. The light is an immanent actualization, for otherwise it would surround the object from which it emanates, and remain within it, accumulating there. If this were so, the light could not vanish so long as the object from which it emanates itself continues to subsist. If this object pass from one place to another, light would pass thither also, not because it turns back on itself or changes locality, but because the actualization of the luminous object exists and is present as soon as nothing opposes it. If the distance from the sun to the earth were much more considerable than it really is, the light of the sun would nevertheless reach us, providing no obstacle were interposed. On the one hand, there is in the luminous body an actualization, a kind of superabundant life, a principle and source of activity; on the other hand, beyond the limits of the luminous body, exists a second actualization which is the image of the actualization characteristic of this body, and which never separates itself from the body. Every being has an actualization which is its image; so that, as soon as the being exists, its actualization exists also; and so long as the being subsists, its actualization radiates nearer or further. Actualizations (differ indeed); some are feeble and obscure, others are secret or hidden, others are powerful and radiate afar. When an actualization radiates at a distance it must be admitted to exist there where it acts, where it exercises and manifests its power. Consequently one can see light shine from the eyes of animals whose eyes are naturally brilliant[175]; likewise when the animals that exert a concentrated interior fire happen to open their eyelids, they radiate rays of light into the darkness; while, when they close their eyes, no more light exists outside them. The light therefore does not perish; only, it is no longer produced exteriorly. It does not re-enter into the animal but merely ceases to exist exteriorly, for the visual fire does not pass outside, remaining inside. Is light itself then within? At least this light remains within; but (when the eye is closed) the eyelid forms an obstacle to its diffusion. LIGHT AS ACTUALIZATION IS THE BEING OF THE LUMINOUS BODY, AND IS INCORPOREAL.