After an arsonist burned down his church, Pastor Ted Cole picked his way through the charred rubble still smoldering from the fire and sat down at the piano.  Defiantly he began playing an old hymn written more than four centuries ago by a man who knew trouble as well, Martin Luther.  Cole began gently singing from memory the third verse of Luther's, "A Mighty Fortress Is Our God," which goes: "And tho this world, with devils filled, should threaten to undo us,/ We will not fear, for God hath willed His truth to triumph thru us."