text: So, just to be clear, the most any of us can say is that 1) if there is a Spirit, and 2) if the Spirit is at work within Christianity, then 3) it is reasonable to assume that the same Spirit is at work within other religious traditions. Even that may be something of a stretch, however.
  Phan develops his understanding of Spirit-God in Chapter Three, largely by arguing that the idea is wholeheartedly endorsed by Asian religions, but doesn't explain why we should believe in the existence of a Spirit God at all. Why, in other words, is it more reasonable to conclude from available evidence that our world is imbued with the Spirit of God than to conclude that, as Bertrand Russell and others have argued, it just seems that way to us from our limited perspective? That may have something to do with the fact that this is his apologia to the CDF, but I think he has the resources at his disposal to attempt something more, especially in this friendlier post-Levada, post-Mueller context.