osing that the form itself subsists
without matter, there nevertheless still remains the relation of the
form to its very existence, as of potentiality to act. And such a
kind of composition is understood to be in the angels; and this is
what some say, that an angel is composed of, "whereby he is," and
"what is," or "existence," and "what is," as Boethius says. For
"what is," is the form itself subsisting; and the existence itself is
whereby the substance is; as the running is whereby the runner runs.
But in God "existence" and "what is" are not different as was
explained above (Q. 3, A. 4). Hence God alone is pure act.
Reply Obj. 4: Every creature is simply finite, inasmuch as its
existence is not absolutely subsisting, but is limited to some nature
to which it belongs. But there is nothing against a creature being
considered relatively infinite. Material creatures are infinite on
the part of matter, but finite in their form, which is limited by the
matter which receives it. But immaterial created substances are
finite in their being; whereas they are infinite in the sense that
their forms are not received in anything else; as if we were to say,
for example, that whiteness existing separate is infinite as regards
the nature of whiteness, forasmuch as it is not contracted to any one
subject; while its "being" is finite as determined to some one
special nature.
Whence it is said (De Causis, prop. 16) that "intelligence is finite
from above," as receiving its being from above itself, and is
"infinite from below," as not received in any matter.
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THIRD ARTICLE [I, Q. 50, Art. 3]
Whether the Angels Exist in Any Great Number?
Objection 1: It would seem that the angels are not in great numbers.
For number is a species of quantity, and follows the division of a
continuous body. But this cannot be in the angels, since they are
incorporeal, as was shown above (A. 1). Therefore the angels
cannot exist in any great number.
Obj. 2: Further, the more a thing approaches to unity, so much the
less is it multiplied, as is evident in numbers. But among other
created natures the angelic nature approaches nearest to God.
Therefore since God is supremely one, it seems that there is the
least possible number in the angelic nature.
Obj. 3: Further, the proper effect of the separate substances seems
to be the movements of the heavenly bodies. But the movements of the
heavenly bodies fall within some smal
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