This book invites you to hear what Christian theology has to say to the contemporary world. Christian theology is the creature of the Church, and the Church is the creature of God. When the Church lives out of the tradition it has received, and passes on the good things of that tradition, it has something to say about the world. It speaks theologically when it offers coherent and public talk about God and man. The Church has a more generous definition of the world than our contemporary world has of itself. Theology has a more sophisticated idea of time than does the surrounding world. It talks about time in order to say that the world is not yet settled, and will not be settled until it is established in relationship with God. We raise the subject of time to draw our attention to the way things come and go, and to remind us to be realistic in estimating what we know about them. Eschatology is the Church’s term for this form of self-control.