Excerpt:

1. Whatever may lie at the bottom of this doubtful book must be a question of the first rank and attractiveness, moreover a deeply personal question,—in proof thereof observe the time in which it originated, in spite of which it originated, the exciting period of the Franco-German war of 1870-71. While the thunder of the battle of Wörth rolled over Europe, the ruminator and riddle-lover, who had to be the parent of this book, sat somewhere in a nook of the Alps, lost in riddles and ruminations, consequently very much concerned and unconcerned at the same time, and wrote down his meditations on the Greeks,—the kernel of the curious and almost inaccessible book, to which this belated prologue (or epilogue) is to be devoted. A few weeks later: and he found himself under the walls of Metz, still wrestling with the notes of interrogation he had set down concerning the alleged "cheerfulness" of the Greeks and of Greek art; till at last, in that month of deep suspense, when peace was debated at Versailles, he too attained to peace with himself, and, slowly recovering from a disease brought home from the field, made up his mind definitely regarding the "Birth of Tragedy from the Spirit of Music."—From music? Music and Tragedy? Greeks and tragic music? Greeks and the Art-work of pessimism? A race of men, well-fashioned, beautiful, envied, life-inspiring, like no other race hitherto, the Greeks—indeed? The Greeks were in need of tragedy? Yea—of art? Wherefore—Greek art?...

We can thus guess where the great note of interrogation concerning the value of existence had been set. Is pessimism necessarily the sign of decline, of decay, of failure, of exhausted and weakened instincts?—as was the case with the Indians, as is, to all appearance, the case with us "modern" men and Europeans? Is there a pessimism of strength? An intellectual predilection for what is hard, awful, evil, problematical in existence, owing to well-being, to exuberant health, to fullness of existence? Is there perhaps suffering in overfullness itself? A seductive fortitude with the keenest of glances, which yearns for the terrible, as for the enemy, the worthy enemy, with whom it may try its strength? from whom it is willing to learn what "fear" is? What means tragic myth to the Greeks of the best, strongest, bravest era? And the prodigious phenomenon of the Dionysian? And that which was born thereof, tragedy?—And again: that of which tragedy died, the Socratism of morality, the dialectics, contentedness and cheerfulness of the theoretical man—indeed? might not this very Socratism be a sign of decline, of weariness, of disease, of anarchically disintegrating instincts? And the "Hellenic cheerfulness" of the later Hellenism merely a glowing sunset? The Epicurean will counter to pessimism merely a precaution of the sufferer? And science itself, our science—ay, viewed as a symptom of life, what really signifies all science? Whither, worse still, whence—all science? Well? Is scientism perhaps only fear and evasion of pessimism? A subtle defence against—truth! Morally speaking, something like falsehood and cowardice? And, unmorally speaking, an artifice? O Socrates, Socrates, was this perhaps thy secret? Oh mysterious ironist, was this perhaps thine—irony?...

2. What I then laid hands on, something terrible and dangerous, a problem with horns, not necessarily a bull itself, but at all events a new problem: I should say to-day it was the problem of science itself—science conceived for the first time as problematic, as questionable. But the book, in which my youthful ardour and suspicion then discharged themselves—what an impossible book must needs grow out of a task so disagreeable to youth. Constructed of nought but precocious, unripened self-experiences, all of which lay close to the threshold of the communicable, based on the groundwork of art—for the problem of science cannot be discerned on the groundwork of science,—a book perhaps for artists, with collateral analytical and retrospective aptitudes (that is, an exceptional kind of artists, for whom one must seek and does not even care to seek ...), full of psychological innovations and artists' secrets, with an artists' metaphysics in the background, a work of youth, full of youth's mettle and youth's melancholy, independent, defiantly self-sufficient even when it seems to bow to some authority and self-veneration; in short, a firstling-work, even in every bad sense of the term; in spite of its senile problem, affected with every fault of youth, above all with youth's prolixity and youth's "storm and stress": on the other hand, in view of the success it had (especially with the great artist to whom it addressed itself, as it were, in a duologue, Richard Wagner) a demonstrated book, I mean a book which, at any rate, sufficed "for the best of its time." On this account, if for no other reason, it should be treated with some consideration and reserve; yet I shall not altogether conceal how disagreeable it now appears to me, how after sixteen years it stands a total stranger before me,—before an eye which is more mature, and a hundred times more fastidious, but which has by no means grown colder nor lost any of its interest in that self-same task essayed for the first time by this daring book,—to view science through the optics of the artist, and art moreover through the optics of life....