In regard to the translation itself—which owes a good deal to many excellent suggestions made by Mr. Thomas Common—it adheres, as a rule, closely to the German text; and in only two or three instances has a slightly freer rendering been adopted in order to make the sense quite clear. There are one or two cases in which a punning or double meaning could not be adequately rendered in English: _e.g._ Aphorism 50, where the German word “Rausch” means both “intoxication” and also “elation” (_i.e._ the exalted feelings of the religious fanatic). Again, we have “Einleid,” “Einleidigkeit,” in Aphorism 63—words which do not quite correspond to pity, compassion, or fellow-feeling, and which, indeed, are not yet known to German lexicographers. A literal translation, “one-feeling,” would be almost meaningless. What is actually signified is that both sufferer and sympathiser have nerves and feelings in common: an experience which Schopenhauer, as Nietzsche rightly points out, mistook for compassion or pity (“Mitleid”), and which lacked a word, even in German, until the later psychologist coined “Einleid.” Again, in Aphorism 554 we have a play upon the words “Vorschritt” (leading, guidance) and “Fortschritt” (progress). All these, however, are trifling matters in comparison with the substance of the book, and they are of more interest to philologists than to psychologists. It is for psychologists that this book was written; and such minds, somewhat rare in our time, may read in it with much profit. J. M. Kennedy. LONDON, _September_ 1911. AUTHOR’S PREFACE. In this book we find a “subterrestrial” at work, digging, mining, undermining. You can see him, always provided that you have eyes for such deep work,—how he makes his way slowly, cautiously, gently but surely, without showing signs of the weariness that usually accompanies a long privation of light and air. He might even be called happy, despite his labours in the dark. Does it not seem as if some faith were leading him on, some solace recompensing him for his toil? Or that he himself desires a long period of darkness, an unintelligible, hidden, enigmatic something, knowing as he does that he will in time have his own morning, his own redemption, his own rosy dawn?—Yea, verily he will return: ask him not what he seeketh in the depths; for he himself will tell you, this apparent Trophonius and subterrestrial, whensoever he once again becomes man. One easily unlearns how to hold one’s tongue when one has for so long been a mole, and all alone, like him.— 2.