I will mention only two ways that the scriptures shape our involvement in politics.
First, we should use the Bible to guide us in what behaviors we seek to put into law. I would say it like this: Behaviors revealed in Scripture as essential to the common good—essential to the survival of a society—should be aggressively commended by Christians for enactment as law by every means of persuasion possible—with both biblical arguments and natural arguments.
One example. This would be true, I believe, for the present controversy over the nature of marriage and whether it can be redefined as a relationship between two men or two women. Marriage between a man and a woman is so fundamental to the survival of society that Christians should work for its legal protection.
If someone says that we are legislating our morality we should respond: Laws protecting marriage are in the same category with laws protecting life and property and contracts. But no one complains that the prohibition of murder and stealing and perjury is the legislation of morality. So no one should complain that the protection of marriage is the legislation of morality. Marriage between a man and a woman is a moral and natural reality so profoundly woven into fabric of human life and society that to undo it will probably be the undoing of our nation.
Other examples could be given. There are behaviors that destroy children. We call it abortion. There are behaviors that destroy the environment. And Christians should make a case from Scripture that God means for us not to burn the house down that he gave us to live in…”