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. _______________________
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.