'It is simple, but true, to say that theology has only one, single problem: God. We are theologians for the sake of God; if we are not, then we ought not to call ourselves theologians at all. God is our dignity. God is our agony. God is our hope.'
Jürgen Moltmann, 'Theology in the Project of the Modern World' in A Passion for God's Reign, p. 1.