I was expecting arguments on whether there was a God or not, and Karen Armstrong gave them to me. But what she gave me was the history of arguments for or against God, which was much more interesting than what I expected. I found the relationship between Protestant Christianity and science to be particularly interesting, and left the book feeling that my expectation that someone would prove to me, logically, that there was a God was itself an artifact of Enlightenment-era Protestantism's relationship to science. I also ended up feeling that yes, there should be reason in religion, but expecting scientific proof of God is expecting chocolate in your peanut butter. The Enlightenment may have felt that science and religion are two great tastes that taste great together, but not every jar of peanut butter is a Reese's cup.