answer me these questions three

I'm reading A New Kind of Christian and it has some interesting points. I disagree with a some major points that they make though, but I think there is some good stuff that can be mined from the other points they make. The book is about a postmodern viewpoint and I really won't go into what that means here because I'm not sure I fully grasp the concept yet. The main question I want you who read this blog to answer is:

What's the point of being a Christian?