We sometimes speak of written history and of its standard works as though the essence of that science consisted in books and not in knowledge. "There are no standards of history," said Droysen, a German professor to an American student who had asked his advice respecting the choice of standard works for an historical library. In this caustic saying there lies a profound truth. History is a living, self-developed science, not a collection of fossils. Books like facts, are sometimes dead to history, and historical standards, like historical facts, are grander in their spiritual influence than in their material form. In the onward march of historical science, historians are perhaps the standard bearers of fact and their works may be called the battle-flags of history which kindle the zeal of the ever-advancing present in men and awaken a sense of unity with the great past, which has gone on before us. But written history often becomes shot-riddled by criticism and is set away, at last, like battle-flags, after many honorable campaigns, in some museums of relics or some temple of fame. Unless such trophies continue to awaken in the living present a sort of enthusiasm and a sense of unity with the past experience of our race, then are our historic standards but antiquarian rubbish, indeed, as useless and unmeaning as the banners and symbols of heraldry. The subject of History is the self-conscious development of the human race, the Ego of Humanity. The realization of this Ego does not lie in any fictitious personality, but in the universal consciousness that man is one in all ages and that the individual human mind may mirror to itself and to others the thought and experience of the race. As the heavens are reflected in a single drop of dew, so in the thoughts of the individual human mind we may sometimes behold a reflection of the self-knowledge of Humanity. For the individual is sometimes the very best expression of the whole with which it stands in connection. The onward march of world-history seems to have concentrated itself in the development of individual peoples like the Jews, Greeks, Romans, and the Germanic peoples. As these nations best typify historic progress and certain world-historic ideas, so the historic thought of manhood may be most fully realized by individual minds. For example, a single historian, like Thucydides, may reflect the self-consciousness of his age, and a single mind, in our own day, may realize, in some measure, at least through the works of history, the self-knowledge, the Ego of Humanity. It should be the aim of every student of History thus to realize in his own consciousness the historic thought of mankind. "The life of each individual," says Dr. W. T. Harris, the American Hegel, "presupposes the life of the race before him, and the individual cannot comprehend himself without comprehending first the evolution of his day and generation historically from the past."