Pretty sure it’s mentioned in Twelve Virtues of Rationality, which provides a decent summary in context—although you should read Musashi’s Book of Five Rings if you really want to absorb the concept. He’s a lucid (if sometimes infuriatingly vague) writer, and there are several good translations floating around.
Pretty sure it’s mentioned in Twelve Virtues of Rationality, which provides a decent summary in context—although you should read Musashi’s Book of Five Rings if you really want to absorb the concept. He’s a lucid (if sometimes infuriatingly vague) writer, and there are several good translations floating around.