Heh, how about this:
I'm the most atheist person i know, yet. . . i work at a church ( i do the music ).
I can't possibly begin to explain my opinion. Well, maybe I can, but I won't. Ok, maybe. Think of typing on a keyboard. I feel the concavity of the keys, and I hear them click. Occasionally, I even look at a few non-alphanumeric keys. In a superficial way, these feelings can be explained in terms of activity in the nervous system.
What makes me believe in some kind of supernatural is that the explanation is no deeper. Mere chemistry doesn't explain how I feel when I listen to
Kanda Bongo Man, or the feeling of a leaden pendant on my chest when I reflect on the past and what might have been. To me, some 'other' is the explanation. Maybe that's hasty, and it's probably even a logical fallacy. As such, I won't say it's 'fact' or even 'logical', only a strong intuitive conviction.
How this supernatural interacts with us, whether it cares about us or can care about us, what morals it dictates, or whether it can make a boulder it can't move, that I leave to others. I am somewhat pessimistic though. For instance, Darfur is the first war, make that genocide, perpetrated in a large part over *water scarcity*. That alone will be a major problem in coming years. A 'Nirnaeth Arnoediad' may soon come.