Responding to Tim Keller's "Making Sense of God" Talk

The other day one of my former pastors who I am still friends with posted the following video of Tim Keller giving a talk at Google to give an overview of his new book "Making Sense of God".  He specifically asked his non-believing friends if we'd like to have a discussion about it.

I obliged, but it ended up being a 1500 word response and I was pretty happy with it, so I've decided to post it here on my blog.

For reference, here's the video.  My response below the fold only covers the main talk, not the Q&A.