One cannot prove nor disprove the existence of God. Therefore, to be rational, you have to say you do not know if God exists or not.
With respect to the belief in God (or anything for that matter), the burden of proof is on the believer. Without the proof that God exists (after many centuries of study), it’s an entirely rational conclusion to state that God does *not* exist.
I happen to believe in the existence of a family of invisible elephants that float approximately six feet over my deck. They are odorless, and make no sound. The nature of these elephants, being invisible n’ all, makes it somewhat tricky for others to disprove their existence. Bummer.
