People inherently want to be happy, at peace and Good. While there are those of us who use some aspects of religious ideology for negativity, the most dominant primary theme in just about all well known religions is Goodness. I've even heard satanist say that they worship him because he "accepts everyone" and "doesn't shun people"...
regardless of weather or not you believe in anything, it's been shown that generally people who find solace in some sort of religion are often overall happier. And of course happiness has a positive influence to healthiness.