Just like I don't need to prove to you that air exists even though you can't see it. Paul makes it pretty clear in Romans 1 that His existence is plenty clear to all, but the evidence is suppressed; in other places the Apostle says that natural man is blind to it. I think that is absolutely true, therefore I've never considered it worthwhile to argue the point.
Then you've reduced your position to one of circular reasoning.
As for air, i don't have to assume it exists. I can put an upside down cut into the water and see something is displacing the water. For there we can do more complex experiments until we can determine the atomic break down etc.
You didn't use logic or reason to get into this opinion, I cannot use logic or reason to get you out of it.
You cannot over estimate the unimportance of nearly everything. John Maxwell
