The result is an enthralling combination of powerful technical wisdom and the philosophical elucidation offered to martial artists by Buddhism, Shintoism, Confucianism, and Taoism. From the metaphor of the Four Elements and fundamentals of physical practice and strategy to an offering of Zen wisdom on the "way" of nature, "Musashi's Book of Five Rings" is as profound and important a book on martial arts as you will find.