"The Christian's concern should never only be for the Church and for God's future kingdom, but also for natural life and the world. Our concern should include good government, equal opportunity, justice, values that ennoble the human person, as well as concerns for our environment and the world's resources. These concerns are not secular. Rather they are deeply spiritual, for without a sustainable world and cultural values based on freedom and justice, the message of God's love revealed in Jesus Christ would fall into a vacuum".
Dietrich Bonhoeffer - Ethics