Check this out from Eric Metaxas via Fox News (yes, he's the one that wrote Bonhoeffer).
How far we we've come from the days when a British officer cabled from Dunkirk the three words "But if not..." and they bore the full meaning of Shadrach, Meshach, and Abednego's declaration to Nebuchadnezzar, before being throne into the furnace:
“O Nebuchadnezzar, we have no need to answer you in this matter. If this be so, our God whom we serve is able to deliver us from the burning fiery furnace, and he will deliver us out of your hand, O king. But if not, be it known to you, O king, that we will not serve your gods or worship the golden image that you have set up.”