What is the church, and what is essential to it particularly in a post-Christian age?

In contrast to "the City", that is, the world (including the hedonism and narcissism of popular culture) that virtually all human beings now inhabit, the author calls upon the church to remember that it is "Another City" that does not compromise itself by giving allegiance to any political entity that belongs to this world.

Instead, the church must have the courage to live, like Israel of old, in the diaspora as a distinct minority, remaining an uncompromising and faithful servant of God's final (though still future) triumph in the risen Christ.