Uncommon Decency, Richard J. Mouw, pp. 149-15
During the Middle Ages there was a popular story which circulated about Martin of Tours, the saint for whom Martin Luther was named. It was said that Satan once appeared to St Martin in the guise of the Savior himself. St. Martin was ready to fall to his feet and worship this resplendent being of glory and light. Then, suddenly, he looked up into the palms of his hands and asked, "Where are the nail prints?" Whereupon the apparition vanished.
Theologians tell a story to illustrate how Christ's triumph presently benefits our lives: Imagine a city under siege. The enemy that surrounds they city will not let anyone or anything leave. Supplies are running low, and the citizens are fearful. But in the dark of the night, a spy sneaks through the enemy lines. He has rushed to the city to tell the people that in another place the main enemy force has been defeated; the leaders have already surrendered. The people do not need to be afraid. It is only a matter of time until the besieging troops receive the news and lay down their weapons.
Similarly, we may seem now to be surrounded by the forces of evil -- disease, injustice, oppression, death. But the enemy has actually been defeated at Calvary. Things are not the way they seem to be. It is only a matter of time until it becomes clear to all that the battle is really over.