Shia Islamic Argument for the existence of God

[GrandizerII]

Ok, I actually read the whole post. Still confusing, so let's go bit by bit here:

I agree with the first few paragraphs. So skipping over to the part where I started to get really confused. Can you explain to me more what this is actually saying?

I think it's saying that aggregates or groups are not actual entities in and of themselves. For example, "a dozen cars" is not an actual entity apart from its individual constituents. Aggregates or groups are just a concepts or names that refer to a number of actual individual units.

Ok, but can finite entities not be part of an infinite reality?