tain fresh places--which cannot be
said of God, who by His infinity fills all places, as was shown above
(Q. 8, A. 2).

Thus in every creature there is a potentiality to change either as
regards substantial being as in the case of things corruptible; or as
regards locality only, as in the case of the celestial bodies; or as
regards the order to their end, and the application of their powers to
divers objects, as in the case with the angels; and universally all
creatures generally are mutable by the power of the Creator, in Whose
power is their existence and non-existence. Hence since God is in none
of these ways mutable, it belongs to Him alone to be altogether
immutable.

Reply Obj. 1: This objection proceeds from mutability as
regards substantial or accidental being; for philosophers treated of
such movement.

Reply Obj. 2: The good angels, besides their natural endowment
of immutability of being, have also immutability of election by divine
power; nevertheless there remains in them mutability as regards place.

Reply Obj. 3: Forms are called invariable, forasmuch as they
cannot be subjects of variation; but they are subject to variation
because by them their subject is variable. Hence it is clear that they
vary in so far as they are; for they are not called beings as though
they were the subject of being, but because through them something has
being.
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QUESTION 10

THE ETERNITY OF GOD
(In Six Articles)

We must now consider the eternity of God, concerning which arise six
points of inquiry:

(1) What is eternity?

(2) Whether God is eternal?

(3) Whether to be eternal belongs to God alone?

(4) Whether eternity differs from time?

(5) The difference of aeviternity and of time.

(6) Whether there is only one aeviternity, as there is one time, and
one eternity?
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FIRST ARTICLE [I, Q. 10, Art. 1]

Whether This Is a Good Definition of Eternity, "The Simultaneously-
Whole and Perfect Possession of Interminable Life"?

Objection 1: It seems that the definition of eternity given by
Boethius (De Consol. v) is not a good one: "Eternity is the
simultaneously-whole and perfect possession of interminable life." For
the word "interminable" is a negative one. But negation only belongs
to what is defective, and this does not belong to eternity. Therefore
in the definition of eternity the word "interminable" ought not to be
found.

Obj. 2: Further, eternity sig