Complicit in Germany's crimes was occupied France, which had surrendered to Hitler so quickly, and most of whose populace initially embraced the collaborationist Vichy regime, whose many disgraces included cooperation with deporting French Jews. When General Charles DeGaulle, a Catholic, returned to liberated Paris, he spoke not of shameful occupied France but of "eternal" France, whose idealized model of civilization transcended the sins of the previous several years and summoned the French to a renewed moral grandeur.

In America, Abraham Lincoln was not dissimilar. When the Kansas-Nebraska Act facilitated slavery's expansion into the West, he left the relative ease and wealth of his law practice for a return to the turmoil and danger of politics. Confronted by hateful passions that exploded into war, during which he accurately speculated that he, as president, could end up a fatality, he never tired of citing his country's highest ideals, as embodied in the Declaration of Independence. A century later, the Rev. Martin Luther King, Jr. likewise would point to the Declaration's transcendent promise, refusing to reject his nation's nobler impulses, even as he faced his own martyrdom.

Few today in America likely face the ultimate plight of a King or a Lincoln, much less a Bonhoeffer. But our times are sufficiently challenging if not stormy. Remarkably, the latest polls declaring the supposedly endless ascendancy of the religiously unaffiliated also confirm that Americans are about as church going as they have ever been for much of the last century. Forty-two percent of American voters in 2012 professed to attend church weekly or more, almost certainly more than did in Lincoln's day.

And yet our culture, including many of the church going, is increasingly captive to radically secular and morally problematic assumptions about human life and behavior. To confront this encroaching threat to our God-created humanity and God-gifted liberty we certainly need ardently recommitted Christians. But we also urgently need, while not confusing the two, equally recommitted Americans.