Ah, a fellow agnostic...welcome! I tend more to the atheist side of things, but a handful of philosophies have captured my interest.

I think lucid dreaming is a highly personalized experience, and the whole faith-flying relationship works well for you because you expect it to. For me, however, I may draw strength from the prospect of wreaking havoc/creating mayhem. It varies from person to person. However, I'm sure that this would help a lot of people with their flying.