I think that, in a very large, very old universe where we continually discover new things unimaginable in centuries past, like radio waves and dark matter and energy, agnosticism is prudent.

Of course, my G*d is limited in time, a product of the universe, and likely somewhat limited in space, only being known of a certainty to exist in my mind, so he could be hiding the other side of a black hole somewhere and has yet to be discovered.