I expect I'll be reading Garry Wills's Why I am a Catholic. I'm not a Catholic, but I respect Wills's intelligence and am curious to read how he defines his faith.
The relationship of a believer (self-defined) to a church (community) is the source both of strength and of stress for those who struggle to reconcile modernity and faith. Whether and/or how to participate in any form of institution, no matter how loosely defined, shapes the experience of worship in basic ways. How much agreement (never mind dogma) must a group share in order to think of themselves as a community?
I don't have answers to these questions, but I live with them and feel them to be important.