In San Diego there’s a boat museum with three old submarines tied to the dock. I was visiting the Russian Whisky Class submarine from the 1970s, when I noticed a beautiful sailboat tacking against the wind in the harbor. What’s the difference between these two boats? The sailboat is dealing with wind and current. It is taking risks. The Russian sub is securely fastened to the shore. It is a museum piece. I find that when I talk about the church in the postmodern world, the image of the sailboat resonates with only a few church leaders.