Martin Luther King Jr. Day, to be observed Monday, is an appropriate time to recall an exceptional person. But more importantly, it’s a time to recommit the nation to the cause for which King died and the legacy he left for all of us. The famed civil rights leader, assassinated April 4, 1968, was a preacher with a message as important today as it was more than five decades ago. He saw God’s words as fundamentally connected to his call for equality, nonviolence and justice. King’s religious faith was the heart, center and soul of his work. Without God’s word, King believed, ...