Ok. first we understand that everything within the universe works on cause and effect, except for maybe quantum mechanics. However, why would you assume that this logic applies to the creation of the universe. Note that the physics within the universe may not be the same as the physics before the universe existed. So you need to demonstrate that the law of causality applies to something outside of our universe. Since you can only show examples within the universe, I don’t see how you can possible demonstrate this.
The law of causality seems to be prior to physics, no? Physics is a mathematical modeling of events, of cause and effect, of making predictions. Different physics would therefore still presuppose the law of causality. You need to have causality prior to models of motion, thermodynamics, etc… We would need to abandon physics altogether, it would seem, if there was no law of causality.
If the law of causality does not apply to all things, you aren’t able to close that door again, nor do I think you can conclusively argue that the door should only be open “only
so” much without begging the question or special pleading.
I did mention the principle of sufficient reason (PSR) earlier. It seems that any argument against it being true relies on the PSR being true, for if it wasn’t true, then one can’t guarantee that any of the steps in the logic follow from prior steps or entail the proceeding steps. Any logical demonstration by default assumes the PSR holds in order to be logical. And saying it needs to be demonstrated to be true before you believe it is… well, that’s just non-sensical. “I don’t believe in the PSR because I don’t have sufficient reason to believe it is true.” But if you don’t believe in the PSR, why do you need sufficient reason for it to be true? Or anything else for that matter?
I think you’d need better grounding for other points before I make them, existence being an intrinsic property (the first property of anything that is) or extrinsic, how the property derives, that it’s irrational for a property (not just existence) to be in the system if it’s not possessed intrinsically by anything in the system, that if it has something but doesn’t have it intrinsically it must be given by another (“given” and “another” not necessarily implying intelligence or conscious intention here), how we end up making existence identical to nonexistence if we don’t, etc… And of course the aim isn’t to somehow prove that already presumed being “God” has this intrinsically, but to demonstrate that there must be *something *that does have it intrinsically for anything else to be rational, and it’s this that I refer to when I use the word “God”, and what properties are logically ruled out… But now I’m rambling and bordering (or over the line of?) incoherence for those not already familiar with what I’m talking about.
But to give you the skinny of it, from my reading, is that it’s far more irrational to assume that the PSR and LoC does not hold for all than it is to assume it does hold for all, and that means it’s more rational to assume the implications of them being true (the existence of God) than not. It’s not just about 100% proof and demonstration, but about what’s more rational for us to believe is true.
But I would definitely recommend doing some studious reading if you’re interested and not just asking for a proof from a message board. What arguments there are, and you’ll find them on the Internet, are typically based on more foundational material that sets them up in the first place.