"[This book] mirrors all of Nietzsche's thought and could be related in hundreds of ways to his other books, his notes, and his letters. And yet it is complete in itself. For it is a work of art." —Walter Kaufmann in the Introduction Nietzsche called The Gay Science "the most personal of all my books." It was here that he first proclaimed the death of God—to which a large part of the book is devoted—and his doctrine of the eternal recurrence. Walter Kaufmann's commentary, with its many quotations from previously untranslated letters, brings to life Nietzsche as a human being and illuminates his philosophy. The book contains some of Nietzsche's most sustained discussions of art and morality, knowledge and truth, the intellectual conscience and the origin of logic. Most of the book was written just before Thus Spoke Zarathustra , the last part five years later, after Beyond Good and Evil . We encounter Zarathustra in these pages as well as many of Nietzsche's most interesting philosophical ideas and the largest collection of his own poetry that he himself ever published. Walter Kaufmann's English versions of Nietzsche represent one of the major translation enterprises of our time. He is the first philosopher to have translated Nietzsche's major works, and never before has a single translator given us so much of Nietzsche.

在尼采的所有著作中，《道德的谱系》（1887年）可能是最难懂也最具独创性的。 《道德的谱系》的主旨并不在于探问道德的未来，而是探问道德的过去，道德的来源与历史，即那依然笼罩在黑暗之中，或者至少是向黑暗深处延伸的来源与历史。《道德的谱系》为道德制定了一个家谱，而其副标题“一篇论战檄文”则暗示着，尼采将在这里探讨一些颇具挑衅性的东西，读者很快就会知道，被我们今天视作高贵正派的那些价值却有着粗俗鄙陋的起源，而善与恶则有着非常可疑的祖先。