"After that I studied morning and evening searching for the principle, and came to realize the Way of Strategy when I was fifty. Since then I have lived without following any particular Way. Thus with the virtue of strategy I practice many arts and abilities - all things with no teacher. To write this book I did not use the law of Buddha or the teachings of Confucius, neither old war chronicles nor books on martial tactics. I take up my brush to explain the true spirit of this Ichi school as it is mirrored in the Way of heaven and Kwannon." - Miyamoto Musashi, The Book of Five Rings