I was a pretty intense believer in Christianity at an early age and also stopped believing pretty early. Looking at religion from middle age now, it strikes me that Christianity is not a good religion to not believe in. As soon as I stopped believing in the literal existence of God, I immediately felt uncomfortable with Christianity and had to distance myself from it, even though I was culturally and morally grounded in it. I had to get away, and I never saw any path to reengaging with it in a beneficial way.<p>I don't think every religion is like that. I think there are approaches to Judaism and Buddhism that you can participate in that don't demand true faith in the "spooky side," as one of my friends puts it. And I don't just mean being ethnically or culturally linked with a religion, I mean actively engaging with it in a regular and organized way. Christianity doesn't offer that, and I don't know if it could or ever will. (I tried the Unitarians.) If it did, I'd probably enjoy being "Christian" again, at least with quote marks. As it is, if I was forced to affiliate myself with an organized religion and participate in weekly ritual services, I'd probably choose my local Zen center or see if my Jewish friends thought it would make sense for me to join them. Going to a Christian church without believing in capital-G God would be unpleasant and unrewarding.