So, those who don't have any religion (they're "spiritual") know God well?
Oh, I don't know about that. I had a Christian upbringing, and never lost my faith in Jesus Christ. Christianity is certainly the context in which I approach God. But I don't buy into the demand that one is doomed unless one believes in Christ, and, while religion is a useful context for approaching God, I don't accept that membership in a religious community is necessary or essential. Adherence to the golden rule is, I understand, a tenet of most if not all of the world's religions, but it is also a conclusion one can reach by means of logic.
Some folks feel the need to be religious in order to ensure they're "saved" - I guess that the logic behind Pascal's wager. But the hope of salvation in the "next" world isn't what's important, IMO - it is the attainment of inner peace and enlightenment in THIS world that is the tangible good that one can strive for, and achieve.