Takuan Sōho's (1573-1645) two works on Zen and swordsmanship are among the most straightforward and lively presentations of Zen ever written and have enjoyed great popularity in both premodern and modern Japan. Although dealing ostensibly with the art of the sword, Record of Immovable Wisdom and On the Sword Taie are basic guides to Zen--"user's manuals" for Zen mind that show one how to manifest it not only in sword play but from moment to...