Originally posted by JimL
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Originally posted by JimL
This would be true regardless of whether or not He existed.
I think you're the one that's simply asserting this without an argument. Why does an actual cause need be distinct from that which it causes?
A match is struck by a hand. Radioactive decay happens from a W-boson coupling to isospin between nucleons. A stone moves from rest to falling under the force of gravity from the Earth. Etc.. all things in the universe are continuously changing due to other already existing substances.
Furthermore everything owes its properties to other substances. Your arm is strong because of its bones, those gain their strength from their cellular structure and so forth.
In this latter kind of timelessly ordered series of causes, each substance has potential and actuality.
Since everything that is a composite of actuality and potentiality, has it’s actuality actualized, by something else that Is already actual. Then in order for anything undergoing change to exist at all something has to exist that is pure actuality and the ultimate cause it.
Why is what you call a purely actual cause necessary at all?
And how does god create the non-existent to become existent? On what basis should it be believed that non-existent things even exist as potentialities. Why should one believe that the substance of existence was at one time just a potential existent which potential was actualized by a being that has the power to create things out of nothing? Upon what reasoning should that be believed?
The argument has it’s conclusion as a deductive demonstration. It follows trivially as a corollary based on things existing that there was a potentiality to actualize.
As for whether the universe was at some point actualized de novo, the argument is agnostic about that, and I in this discussion I won’t make a claim either way.
The classical argument from motion focuses only on timelessly ordered chains of causality.
As for why one would make a division between actuality, and potentiality. The answer is that it makes great sense of a universe where things can change, while preserving identity rules for those things undergoing change. Modern Quantum Mechanics in many versions takes this approach as well.
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