Have you ever, out of a drowsy, lazy conviction that all knowledges, all arts, all dreams, are only patient sums of many toils of many millions dead and living, suddenly started into an uncanny consciousness that knowledges and arts and dreams are things more real than any living being ever was, which suddenly reveal themselves, unasked and unawaited, in the most obscure corners of soul-life, flashing out in prismatic glory to dazzle and shock all your security of thought, toppling it with vague questions of what is reality, that you cannot silence? When you hear that an untaught child is able, he knows not how, to do the works of the magicians of mathematics, has it never seemed to you that suddenly all books were swept away, and there before you stood a superb, sphinx-like creation, Mathematics itself, posing problems to men whose eyes are cast down, and all at once, out of whim, incorporating itself in that wide-eyed, mysterious child? Have you ever felt that all the works of the masters were swept aside in the burst of a singing voice, unconscious that it sings, and that Music itself, a master-presence, has entered the throat and sung? No, you have never felt it? But you have never heard the Chain Gang sing! Their faces were black and brutal and hopeless; their brows were low, their jaws were heavy, their eyes were hard; three hundred years of the scorn that brands had burned its scar upon the face and form of Ignorance,--Ignorance that had sought dully, stupidly, blindly, and been answered with that pitiless brand. But wide beyond the limits of high man and his little scorn, the great, sweet old Music-Soul, the chords of the World, smote through the black man's fibre in the days of the making of men; and it sings, it sings, with its ever-thrumming strings, through all the voices of the Chain Gang. And never one so low that it does not fill with the humming vibrancy that quivers and bursts out singing things always new and new and new. I heard it that day.