From Garry Wills, The Kennedy Imprisonment:
King's eloquence endures, drawn as it was from ancient sources--the Bible, the spirituals, the hymns and folk songs. He was young at his death, younger than either Kennedy; but he had traveled farther. He did fewer things, but those things last. A mule team drew his coffin in a rough cart; not the sleek military horses and the artillery caisson. He has no eternal flame--and no wonder. He is not dead.