The trouble with basing values on religions, though, is that the premises of most of them are pure wishful thinking; you either have to refuse to scrutinise those premises - take them on faith, declare that they "transcend logic" - or reject them. As Paul Davies has said, most Christian theologians have retreated from all the things that their religion supposedly asserts; they take a much more "modern" view than the average believer. But by the time you've "modernised" something like Christianity - starting off with "Genesis was all just poetry" and ending up with "Well, of course there's no such thing as a personal God" - there's not much point pretending that there's anything religious left. You might as well come clean and admit that you're an atheist with certain values, which are historical, cultural, biological, and personal in origin, and have nothing to do with anything called God.
— Greg Egan