How should we live as dual citizens: citizens both of the kingdom of God and of our nation? How much should we involve ourselves in society and public life? Many of us find integrated, whole-life discipleship very difficult. It is easier to live, not so much a double life as a dualistic one, where faith is a personal matter with little impact on work and other spheres of life. Graham Cray shows that there are profound gospel reasons for taking seriously both our national life and our call to be Christian citizens. A nation's social health is a matter of Christian action and concern because it matters to God.