Theology springs out of a passion for God's kingdom and its righteousness and justice, and this passion grows up in the community of Christ. In that passion, theology becomes imagination for the kingdom of God in the world, and for the world in God's kingdom. . . .

That means that kingdom-of-God theology can neither withdraw to its own community of faith in fundamentalist fashion nor adapt itself in modernist style to society's prevailing trends. It is resistingly and productively concerned about the future of life in the whole earthly creation.

Jurgen Moltmann, Experiences in Theology