An interesting question

Here. On a cool Autumn night, you are gazing up at the sky when a being suddenly appears and asks, "What can I do to make you believe that I am God?" What is your answer?

I once asked that question to atheist philosopher Keith Parsons. He told me that if the galaxies in the Virgo cluster were to spell out the words "Turn Or Burn This Means You Parsons," that the would turn.