快乐的科学 The Gay Science
（重定向自Gay Science）
《快乐的科学》（意大利语:la gaya scienza），又作《欢愉的智能》（德语:Die fröhliche Wissenschaft）为德国哲学家尼采所着的一本哲学作品，初版于1882年，主要以许多简短的格言集结而成。许多尼采著名的概念都首次出现于本书，如上帝已死（108节）、永恒轮回等。在此书中尼采的经验主义及怀疑主义达到最高峰。
Gay Science
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The Gay Science 快乐的科学
（重定向自Gay Science）
The Gay Science (German:Die fröhliche Wissenschaft) or The Joyous Wisdom is a book by Friedrich Nietzsche, first published in 1882 and followed by a second edition, which was published after the completion of Thus Spoke Zarathustra and Beyond Good and Evil, in 1887. This substantial expansion includes a fifth book and an appendix of songs. It was noted by Nietzsche to be "the most personal of all [his] books", and contains the greatest number of poems in any of his published works.