Oh, the typical theological reasons. If there does exist some greater plan or higher power, if anyone's gotten any of it right whatsoever, then I haven't seen any evidence for it. Not in the world I'm from. There are no gods or devils, and no one's watching over anything. There's only us.

But that's pure skepticism. If I met him tomorrow, I'd have to change my tune! Tell me, how does one know the devil is the devil?