The book Hokyo Zanmai is a long-kept secret text that has been passed down and explained personally for centuries. It presents the teachings of the "Five Principles" (go-i) to the reader in a highly encrypted form and leads them directly to the deeper meaning of Zen. The enlightening comments of Master Deshimaru open up the possibility for us to realize the wisdom of millennia in our everyday lives. The mirror of Hokyo Zanmai allows us to look deep into the essence of our original being.