I think I'd choose "Illusions : The Adventures of a Reluctant Messiah" by Richard Bach (he also wrote "Jonathan Livingston Seagull"). "Illusions" isn't a 'religous' book, but reading it can take you on a journey of self discovery. I try to read it once every year or so, just to remind me that I can do anything I want, if I want it bad enough.

If that fails your 'religious' book test, then the second book would be "Tunnel in the Sky" by Robert Heinlein. It has a 'survival' theme, but it's also an excellent story. It's dual use in your survival kit, entertaining distraction and motivational novel all in one.

Dennis (the Menace)