Most of what passes for spirituality these days is what I would call "woo," i.e. New Age nonsense that couldn't - and shouldn't - form the basis for any sense of community.

On the other hand, a kind of humanist faith in transcendant values like truth, beauty, and goodness, could perform that function very nicely. And even though he was a Christian, the theologian Paul Tillich provided a road map for what such a faith would look like in his book Dynamics of Faith. Read it alongside humanist philosopher John Dewey's book A Common Faith and you'll see exactly what I mean.