True believers will never change their minds about the existence of God, just as true atheists will never change their minds about the non-existence of God. Faith is like love. You can't see it, can't explain it, can't put it under a microscope, can't conjure it a laboratory. Yet most people agree that love exists because they, at one point, felt love. I have had atheists ask me why I believe in God. My answer was it is not just that I believe He exists, it is that I know He exists. Your entire way of viewing the world and the universe changes. Everything makes sense to you. And you are filled with peace. Serenity that defies all understanding.