I don't think a world view can defined much more than "one's foundational of life, the world and self". I think what the author is doing is defining <i>a world view</i> - especially, any fairly established world view is going to determine which questions are important, which order they should be asked in and so-forth.<p>Edit: Especially, "Is there a God?" is one of the first questions asked and answered in certain world views including the authors' but by no means all. "Should you even start by considering a potential God" is another question one can ask.