I believe what Karen Armstrong is trying to do is refine the definition of God and to respect all the real life experiences of so many people, of so many ages, and of so many faiths. Contrary to what some other reviewers have said, I find her argument - her case for "God" - scrupulously argued. Let's be clear about this...Dr. Armstrong is very well read. Time and again, she finds evidences in the thinking of the Bible writers, the early Christian theologians, the Talmudic rabbis of the Middle Ages, the important philosophers of the Islamic Golden Age...or even in practices such as those of the Sufi or Christian mystics. And yes, even the scientists! In a nutshell, the book is an Intellectual History of how the idea of God has been understood and argued, from prehistory to the present, including the recent populism of the New Atheists (as opposed to the 19th century agnostics).
One of the most interesting chapters talks about the early history of Christianity when the idea surfaced that God created the universe from "nothing" as opposed to the idea God shaped and formed what already existed as chaos. Once that new idea surfaced, there were two camps, those who believed that Jesus was divine but had been elevated to that status by an immensely powerful being and those who believed that God could never be characterized as being at all and therefore Jesus could be God from the beginning.
Do not be distracted by "petty disputes" about her presentation. As an example, whether the "antiChrist" is described once or twice in the Bible is irrelevant. To Dr. Armstrong, we must not confuse the reality of God with the language about the existence of God. No one can accurately describe the marvelous ecosystem, power, interconnectedness, and beauty of the ocean in mere words...And yet, the ocean exists.
As I interpret the author's position, I am to understand God as a point of destination that is constantly moving. We find God in our personal quest for ultimate truth, ultimate wisdom, ultimate beauty, and...ultimate compassion. Using these ideas, when Kepler or Newton - for example - were seeking to uncover the laws of the universe, they were seeking God. Indeed, I believe that's how these great scientists did understood their mission.
Karen Armstrong is not so interested - as many wrongly think - in being right. She is interested in imagining God in such a way as to force us to become connected to something larger than ourselves. To be enlightened. To become enriched as human beings. Practicing compassionate acts brings one closer to God. Unleashing hate on others - on the other hand - is the very disrespect of God. She shares the thinking of Shakespeare, let's say, in "The Merchant of Venice" , Act IV, scene 1: "The quality of mercy is not strain'd; It droppeth as the gentle rain from heaven...It is enthroned in the hearts of kings; It is an attribute to God himself; And earthly power doth then show likest God's when mercy seasons justice."
I think the book is a treasure and the culmination of years and years of Dr. Armstrong's reading and thinking. Highly recommended...to those of faith and to those of agnostic bent.