After considering the divine perfection we must consider the divine infinity, and God's existence in things: for God is everywhere, and in all things, inasmuch as He is boundless and infinite.
Concerning the first, there are four points of inquiry:
(1) Whether God is infinite?
(2) Whether anything besides Him is infinite in essence?
(3) Whether anything can be infinitude in magnitude?
(4) Whether an infinite multitude can exist? _______________________
FIRST ARTICLE [I, Q. 7, Art. 1]
Whether God Is Infinite?
Objection 1: It seems that God is not infinite. For everything infinite is imperfect, as the Philosopher says; because it has parts and matter, as is said in Phys. iii. But God is most perfect; therefore He is not infinite.
Obj. 2: Further, according to the Philosopher (Phys. i), finite and infinite belong to quantity. But there is no quantity in God, for He is not a body, as was shown above (Q. 3, A. 1). Therefore it does not belong to Him to be infinite.