It is indeed hard to compare Bach even with the other wonders of the history of art. For there is scarcely one who is so identical with his art as is Bach with music. A Michel Angelo does not include a Rembrandt, nor a Rembrandt a Monet; but in Bach there is a Beethoven, a Schumann, a Wagner. I believe that if the Almighty had wished to offer to men in sensible form what at that time was called music, he would then have given them the work of Bach. In it there are the deepest secrets of musical polyphony, as well as the most intense degrees of decadent expression; the mysticism of the Middle Ages is there no less than the perspective of the future. But content and form are not dissociated as they are in history; they are identical, they are one and the same, as they are in the philosophic concept of music. Once, and perhaps once only, in this world has the “Thing in Itself” been realised, and the difference between concept and actuality been reduced to nothing. The history of music can be written with almost exclusive reference to Bach. We might show how it has converged towards him and again diverged from him in search of its special partialities. We might point out how it revolves round him, comes to him, and goes from him in the course of the centuries, just as in the case of the imitative arts we show that they come from Nature and go to her. Bach’s life was the most uneventful conceivable. He made no journeys to Rome and Paris; he learned musical literature by studying and copying. A true “Old Master,” he sits with his serious, almost severe countenance, in the midst of his large family of twenty children, all musical, and composes for instruction or for his own pleasure, without seeing many of his compositions printed. His renown had no wide extent;[75] his bold extravagances aroused only that hostility which does not bring honour, and in his successive posts at Arnstadt, Weimar, Köthen, and Leipzig, he had little opportunity for sunning himself in the rays of princely favour. A single moment of his life perhaps stands out prominently, when Frederick the Great at one of his concerts received the list of strangers in Potsdam, and interrupted the playing to say to his officers, “Gentlemen, old Bach has arrived.” He was instantly summoned, and, in his travelling dress as he was, improvised on a theme of the King’s, which, when completed and published, he dedicated to the King as “Musikalisches Opfer.” When two great men meet, the whole world feels the electric shock. With the appearance of Bach the whole history of music turns to Germany. And clavier-music, so far as it has a particular meaning, is henceforth German. England, France, and Italy, sink either gradually or suddenly into the background.