Short of God coming down herself to say "Howdy y'all!" what would it take to make you a believer in God?
Not necessarily the God of the Bible or any religion in particular, just a Supreme Deity of some sort, call it Ra, Thor or Chaos.
What kind of proof do you need?
What kind of proof do you need to believe in life after death?
What kind of proof do you need to believe in mental telepathy?
let's limit it to those few things.
What would be proof enough?