(But this visible disc also, third(640) in rank, is clearly, for the objects of sense‐perception the cause of preservation, and this visible Helios(641) is the cause for the visible gods(642) of just as many blessings as we said mighty Helios bestows on the intellectual gods. And of this there are clear proofs for one who studies the unseen world in the light of things seen. For in the first place, is not light itself a sort of incorporeal and divine form of the transparent in a state of activity? And as for the transparent itself, whatever it is, since it is the underlying basis, so to speak, of all the elements, and is a form peculiarly belonging to them, it is not like the corporeal or compounded, nor does it admit qualities peculiar to corporeal substance.(643) You will not therefore say that heat is a property of the transparent, or its opposite cold, nor will you assign to it hardness or softness or any other of the various attributes connected with touch or taste or smell; but a nature of this sort is obvious to sight alone, since it is brought into activity by light. And light is a form of this substance, so to speak, which is the substratum of and coextensive with the heavenly bodies. And of light, itself incorporeal, the culmination and flower, so to speak, is the sun’s rays. Now the doctrine of the Phoenicians, who were wise and learned in sacred lore, declared that the rays of light everywhere diffused are the undefiled incarnation of pure mind. And in harmony with this is our theory, seeing that light itself is incorporeal, if one should regard its fountainhead, not as corporeal, but as the undefiled activity of mind(644) pouring light into its own abode: and this is assigned to the middle of the whole firmament, whence it sheds its rays and fills the heavenly spheres with vigour of every kind and illumines all things with light divine and undefiled. Now the activities proceeding from it and exercised among the gods have been, in some measure at least, described by me a little earlier and will shortly be further spoken of. But all that we see merely with the sight at first is a name only, deprived of activity, unless we add thereto the guidance and aid of light. For what, speaking generally, could be seen, were it not first brought into touch with light in order that, I suppose, it may receive a form, as matter is brought under the hand of a craftsman? And indeed molten gold in the rough is simply gold, and not yet a statue or an image, until the craftsman give it its proper shape. So too all the objects of sight, unless they are brought under the eyes of the beholder together with light, are altogether deprived of visibility. Accordingly by giving the power of sight to those who see, and the power of being seen to the objects of sight, it brings to perfection, by means of a single activity, two faculties, namely vision and visibility.(645) And in forms and substance are expressed its perfecting powers.)