2002 George Lucas interview:

Q: What religion are you?

A: I was raised Methodist. Now let's say I'm spiritual. It's Marin County. We're all Buddhists up here.

More evidence that Lucas underwent a major personality shift between the OT and the PT, which also explains the strong good versus evil undercurrent which for some reason he is so uncomfortable with in the PT.

Edit: Found another statement (don't know the year but probably from earlier): The creator of Star Wars and "the Force" was raised Methodist and has studied Eastern and Native American religions. He believes in God and in good and evil..