I’ve come across an
interesting argument (watch the videos linked to have it expalined more in-depth), which argues that matter is a mental construct, and not something that independently exists, and that the Universe is a construct of God’s mind, based on recent discoveries in quantum mechanics.
The chief problem, philosophically speaking, with saying that the universe is a mental construct, is that it attributes to God an anthropomorphic conception of mind.
Our mind is a “faculty” of the soul: which is to say, it is a “power” of our soul that allows it to make concepts and judgments regarding the reality that surrounds us. Thus in man, the mind is
distinct from the man, and so are all his concepts, thoughts, judgments, and so on.
In God, it is different: He is utterly simple, so He cannot have a “mind” that is distinct from Himself, nor are His “ideas” different from Himself. (He is omniscient, certainly, but that is because He sees His creation through His very Essence.)
Since the rest of us–that is, we creatures–are obviously distinct from God, it follows that we are real beings: we subsist (to use the technical term), and not “inside God’s mind,” but really and truly, and with an authentic autonomy. (We are not
independent from God, because He must will to maintain us in existence.)
And if we–material beings that we are–subsist truly, then it must follow that matter exists.
(There are specific things that could be said regarding quantum mechanics, but I think that would sidetrack the main issue. I will just say that as a scientific theory, it is fine; the way some people have
interpreted it philosophically is often bizarre.)
Besides this, I think that positing that the universe is a construct of God’s mind would come dangerously close to pantheism; that is, saying that we are all “parts” of God somehow. (Baruch Spinoza and G.W.F. Hegel made similar theories in their day, and I cannot recommend either of their philosophies as a basis for natural theology.)
I don’t think the Church has ever addressed this particular philosophy directly (although as Linus2nd says, she does teach that the universe is created out of nothing), but I cannot recommend it for the reasons I stated.
God bless!
Fr. Louis Melahn, L.C.