>>17842246>an equally valid claimBut it's not, because nature and God are not the same thing. A few points:
1. If you're claiming that the sum total of natural processes (i.e. nature) exists over and above the processes themselves, then you just posited a new entity "nature", even though typically we don't think of "nature" or "the universe" as something which exists separately from that which actually inhabits it, they're not substances, they're manners of speaking to describe the various states of affairs in reality.
2. Even if we posit some infinite chain of natural causes, resulting in the effects we see in the world now, then you still haven't explain the existence of the chain itself or why it is. Even then you'd still need something to ground it, something non-natural (or else you'd end up right back where you started, and you'd have a circular argument).
Also, since we never observe actual infinities in physical reality, why should we posit an actual infinity of naturalistic chains each explaining each member in the chain?
Assuming there were an infinite chain, we'd never arrive at a starting point, and since efficient causes are ordered from first to last through intermediate causes, then there would be no effects to reach us, so there'd be no effects now. But there are effects now. Reductio ad absurdum there is a first member in the chain. This member cannot be natural because natural effects cannot explain themselves without being caused by other natural entities. Meaning once again you either fall into an infinite chain, or you posit a higher cause which is itself uncaused and therefore non-natural since everything natural has a cause.