Well, I was raised Catholic and still practice, but I consider my churchgoing to be about the least part of my spiritual life. I find the rituals and practices familiar and comforting, but I would never dream of forcing, pressuring or coercing someone else into adopting them. At most, once or twice a year I'll mention to my friends that if they ever WANT to come to Mass with me, they just have to say so.
I have my mental model of God, Heaven, Hell and all that stuff. I'm also completely comfortable with the knowledge that my model is probably wrong in several important respects.
The way I see it, all human philosophies, religions and methods - science and mathematics included - are lenses, filters through which we perceive the greater Truth-with-a-capital-T. All of them are to some degree distorted and flawed, none of them permit truly unbiased perception. Whatever the Truth is, each of us is only capable of perceiving a small part of it. It is through earnest, peaceful discussion and learning from one another that we refine our lenses and grow closer to the Truth. I have been told that this is a somewhat Gnostic notion, but I've never really studied Gnosticism - I'll get around to it sometime.
I trust that the answers will come, in time. Until then, I try to do what I think is right: love others, do good, give freely to those in need. I don't always succeed. But I continue to live in the hope that, even if I'm wrong and nothing but oblivion awaits us all, I can have at least made some other insignificant life a little bit more bearable.