The Argument: You cannot prove God exists.
Very true. I cannot scientifically prove God exists. Although even if I could it really wouldn’t make a difference to anyone. They could still choose to believe whatever they wanted. Either belief or non-belief in God is still belief as science cannot disprove or prove His existence.
Even if God performed miracles through a person in front of you like Jesus did according to the Bible or his apostles, you or anyone else could believe they were just tricks or gimmicks. If someone was healed miraculously you could believe they were just in on it from the start and pretending to be sick, or that it was done through science, etc. God himself could talk to you like the Bible says he did to Saul as he was travelling, suddenly hearing a great voice all around him, and you could choose to believe it’s just a brain tumor or someone playing tricks with audio equipment or some such… The bottom line is that it requires some level of belief.
Personally, I can attest to the tangible change having God in my life has had, which to me is real proof. However I had to take that first step of faith and commit to God before realizing that proof. Of course, to you that proof means nothing as it’s not something I can prove to you happened… You can see it’s a bit of a merry-go-round.
Even if God himself appeared to you. You could choose to believe it was an alien from outer space, perhaps much more powerful and advanced than humans, maybe even wielding magic, but you may still choose to believe that it is not the all-powerful God.
I do however believe, as it says in the Bible, that Jesus will return to the earth someday and collect those who believe in him (Matthew 24:30-31, Matthew 24:37-39, Matthew 24:40-44), and at that time realization of the truth will be granted to everyone; that God is real and all-powerful (Romans 14:10-12, Philippians 2:10-11).
There is plenty of ‘evidence’ to support God’s existence, more even than the ‘evidence’ supporting evolution or the ‘big bang’ theory, and I can personally give you the reasons I believe in God and the tangible difference He has made in my life which is proof to me that He exists, but I cannot force you to believe regardless of what evidence or proof I could present.
I don’t think there’s much point in further discussing the ‘you cannot prove God exists’ topic.