City on a Hill begins with an introduction to postmodernism. Ryken identifies these "post-Christian times" as being characterized by relativism and narcissism. In order to overcome those forces and to be a remedy to society, the church needs to return to the model of the 1st century church - a church that was modeled on teaching, worshiping and caring. These three forces, when combined, caused the church to grow. Ryken identifies seven objectives for the church: expository preaching, worthy worship, Bible study and fellowship, pastoral care, educational programs, missionary work and service to the church and community. Each of these objectives forms a chapter in the book.
Nothing new there, as you can find the same kind of material in many other good and notable books. But Ryken takes it a step further. He shows how relativism and narcissism negatively impacts each of these seven objectives, and also shows how returning to the biblical model can be an antidote to the influences that pervade our culture.
Ryken points out that if we are wise, "we will recommit ourselves to expository preaching, God-centered worship, loving fellowship, pastoral care, costly discipleship, global evangelism, and practical compassion. But none of this will matter unless we recognize our need - our daily need - for the gospel. The church can only be a city on a hill if it confesses its sin and trusts in the crucifixion, resurrection, and intercession of Jesus Christ for any hope of salvation" (page 179).
I highly recommend this book (4.5 stars). It is consistently biblical, returning constantly to the Word of God. It calls the church to return not to the model of the twentieth century, but the model given to us in the Bible. It is accessible and yet challenging (in a good, self-examination kind of way). You won't be disappointed.