What would change your mind?

[Pat Mustard]

I hope this is the right place to post this and I wonder if the subject has been broached before.  What could God do to prove his existence?  Everyone runs around saying, I can't see him, so sorry.  If you asked a christian, they'd say the bible proves his existence.  Forget that.  What sort of things would he have to do to prove it.  Show his face from the heavens?  Flood the earth?  End all suffering?  What could make you change your mind?

Change the fundamental constants of the universe so that pi=3, without altering any other condition of the universe.

After all he specifically asserts that pi=3 in the bible.