Harvard psychologist Daniel Gilbert, popularized on the three-part NOVA series, This Emotional Life, said, "Churchgoers are happier than non-churchgoers, but not for the reasons people expect. Our best indication is that it's not the religion part that makes people happy. It's the going-to-church part. It's the community part. It's the holding hands and singing. It's the knowing-folks-who-would-b…