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; 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.
Thus the light that emanates from bodies is the actualization of the luminous body which is active exteriorly. The light in the bodies whose original nature is such, is the formal being of the originally luminous body. When such a body has been mingled with matter, it produces color. The actualization alone does not suffice to give color; it produces only the hue, because the actualization is the property of a subject, and depends on it, so that nothing can be withdrawn from the subject without simultaneously being withdrawn from its actualization. Light is entirely incorporeal, though it be the actualization of a body. It could not therefore properly be said of light that it withdraws or is present. The true state of affairs is entirely different; for the light, so far as it is the actualization of the luminous body, is its very being. The image produced in a mirror is therefore an actualization of the visible object, which acts on anything that is passive (that can suffer, or experience), without letting any of its substance escape by any wastage. If the object be present, the image appears in the mirror; it is as it were the image of the color that possesses some particular figure. When the object withdraws, the diaphanous body no longer possesses what it possessed while the visible object was acting on the mirror. A similar condition is that of the soul; her actualization dwells within the (world’s) body so long as this soul herself dwells within it.
LIFE AND LIGHT DO NOT PERISH. BUT ARE NO MORE THERE.
(Curiosity might lead some one to ask about) a force that were not the actualization of the Soul, but which only proceeded from this actualization, such as the life which we say is proper to the body. Is the case of such a force similar to that of the light characteristic of bodies? We said that the light inheres in colored bodies, so far as that which produces the colors inheres in the bodies. As to the life proper to the bodies, we think that the body possesses it so far as the soul is present; for nothing can be inanimate. When the body perishes, and when it is no longer assisted by the soul which communicated life to it, nor by the actualization of this soul, how should life remain in the body? What! Has this life perished? No: this life itself has not perished, for it is only the image of an irradiation; it would not be correct to say more than that it is no more there.