>>Update: I think the direct answer to your stated question would be yes, a priest will change his belief assuming (a) the man is rational and not delusional, and (b) the proof is truly beyond doubt.
>>
>>I'd be surprised if that were the case. (Of course, it's a hypothetical question). Priests are not stupid - they know that the minute God is "proven", the game changes for them, and they can no longer play it "deuces wild". Proof of God would likely wreck religion.
>
>Not to mention Atheism..... :o)

The problem is God requires belief first before any proof. And man is, proof first before believing.