This was accepted, but held for lack of space, for publication in the Secular Humanist Bulletin , Vol. Well, it depends on what you mean by God. The universe is a maze of mysteries. Those baffling forces are undeniably real.
Human logic can find no trustworthy evidence to prove, or disprove, the existence of unseen spirits.
Weeping statues and holy apparitions aren't reliable proof. Lack of tangible evidence leads educated people to laugh off these imaginary beings. It's a small step to apply the same rationale to holy ghosts, resurrected saviors, blessed virgins, patron saints, etc. You can't prove they aren't hovering invisible in the room with you - but it's unlikely. Sigmund Freud said the widespread belief in a father-god arises from psychology.