This is a really complicated matter.
I think this sense of spiritual community is achieved if ones feels as an active part of a religious group. On the other hand, he is more likely to suffer peer pressure to be able to fit in this group.
If you see him as a loner, perhaps you should actively pursue with him an activity he gets interested in where he will get to know and interact with other children. It has to be something he likes to do, or else it won't work.
I think the best you can do is to be honest with him, and to make it clear that he can freely speak about things without being reprimanded ( unless he is misbehaving
).
If you want to talk about religion with him, you might want to read some parts of the bible you find relevant ( with the context, please.
) and let him talk about what he understands by these words before you say anything else. Let him interpret as he deems fit, and then explain why you think your view is better ( if you think it is ) or as reasonable.
I see children as flowers. You just can't force them to grow up as you wish. All you can do is provide the proper conditions for it to flourish.