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only the hue, because the actualization is the property of a subject, and depends on it, so that nothing can be withdrawn from the subject without simultaneously being withdrawn from its actualization.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.[176] A WORLD OUTSIDE OF OUR WORLD WOULD NOT BE VISIBLE.