ionysius (Div. Nom. iv) includes Light among the
intellectual names of God. But such names are used in their proper
sense in spiritual things. Therefore light is used in its proper
sense in spiritual matters.

Obj. 3: Further, the Apostle says (Eph. 5:13): "All that is made
manifest is light." But to be made manifest belongs more properly
to spiritual things than to corporeal. Therefore also does light.

_On the contrary,_ Ambrose says (De Fide ii) that "Splendor" is
among those things which are said of God metaphorically.

_I answer that,_ Any word may be used in two ways--that is to say,
either in its original application or in its more extended meaning.
This is clearly shown in the word "sight," originally applied to the
act of the sense, and then, as sight is the noblest and most
trustworthy of the senses, extended in common speech to all knowledge
obtained through the other senses. Thus we say, "Seeing how it
tastes," or "smells," or "burns." Further, sight is applied to
knowledge obtained through the intellect, as in those words: "Blessed
are the clean of heart, for they shall see God" (Matt. 5:8). And thus
it is with the word light. In its primary meaning it signifies that
which makes manifest to the sense of sight; afterwards it was extended
to that which makes manifest to cognition of any kind. If, then, the
word is taken in its strict and primary meaning, it is to be
understood metaphorically when applied to spiritual things, as Ambrose
says (De Fide ii). But if taken in its common and extended use, as
applied to manifestation of every kind, it may properly be applied to
spiritual things.

The answer to the objections will sufficiently appear from what has
been said.
_______________________

SECOND ARTICLE [I, Q. 67, Art. 2]

Whether Light Is a Body?

Objection 1: It would seem that light is a body. For Augustine says
(De Lib. Arb. iii, 5) that "light takes the first place among
bodies."Therefore light is a body.

Obj. 2: Further, the Philosopher says (Topic. v, 2) that "light is a
species of fire." But fire is a body, and therefore so is light.

Obj. 3: Further, the powers of movement, intersection, reflection,
belong properly to bodies; and all these are attributes of light and
its rays. Moreover, different rays of light, as Dionysius says (Div.
Nom. ii) are united and separated, which seems impossible unless they
are bodies. Therefore light is a body.

_On the contrary,_ Two bodies cannot occu