I have been reading Nietzsche on the Origin of Tragedy with the delight of one who discovers a new world, which he has seen already in a dream. I never take up Nietzsche without the surprise of finding something familiar. Sometimes it is the answer to a question which I have only asked; sometimes it seems to me that I have guessed at the answer. And, in his restless energy, his hallucinatory, vision, the agility of this climbing mind of the mountains, I find that invigoration which only a "tragic philosopher" can give. "A sort of mystic soul," as he says of himself, "almost the soul of a Mænad, who, troubled, capricious, and half irresolute whether to cede or fly, stammers out something in a foreign tongue." The book is a study in the origin of tragedy among the Greeks, as it arose out of music through the medium of the chorus. We are apt to look on the chorus in Greek plays as almost a negligible part of the structure; as, in fact, hardly more than the comments of that "ideal spectator" whom Schlegel called up out of the depths of the German consciousness. We know, however, that the chorus was the original nucleus of the play, that the action on which it seems only to comment is no more than a development of the chorus. Here is the problem to which Nietzsche endeavours to find an answer. He finds it, unlike the learned persons who study Greek texts, among the roots of things, in the very making of the universe. Art arises, he tells us, from the conflict of the two creative spirits, symbolised by the Greeks in the two gods, Apollo and Dionysus; and he names the one the Apollonian spirit, which we see in plastic art, and the other the Dionysiac spirit, which we see in music. Apollo is the god of dreams, Dionysus the god of intoxication; the one represents for us the world of appearances, the other is, as it were, the voice of things in themselves. The chorus, then, which arose out of the hymns to Dionysus, is the "lyric cry," the vital ecstasy; the drama is the projection into vision, into a picture, of the exterior, temporary world of forms. "We now see that the stage and the action are conceived only as vision: that the sole 'reality' is precisely the chorus, which itself produces the vision, and expresses it by the aid of the whole symbolism of dance, sound, and word." In the admirable phrase of Schiller, the chorus is "a living rampart against reality," against that false reality of daily life which is a mere drapery of civilisation, and has nothing to do with the primitive reality of nature. The realistic drama begins with Euripides; and Euripides, the casuist, the friend of Socrates (whom Nietzsche qualifies as the true decadent, an "instrument of decomposition," the slayer of art, the father of modern science), brings tragedy to an end, as he substitutes pathos for action, thought for contemplation, and passionate sentiments for the primitive ecstasy. "Armed with the scourge of its syllogisms,