When visitors come to a worship service in my own religious tradition, a great deal depends on how warmly they are welcomed and whether they feel included or excluded by what they hear during the short time they are with us. We may have exactly one shot at communicating who we are to people who know nothing about us - or who think they already know a lot about us - but who, in either case, will remember us at the embodiment of our entire tradition, the prime exemplars of our faith.