Christians are wondering just what's going on in the church these days. How to discern what's behind the changes keeps scholars as well as church leaders and members busy. Pews are emptier and the people still sitting in them are older. Offering plates are lighter, too. As a result, congregations see no other choice but to reduce staff and cut back on programs and ministries. In our consumer-oriented, profit-driven culture, it's all about the numbers, after all. Churches are measured and judged by the same standards as every other institution: Market Share (the size of the weekend crowd);...