BUSHIDO, then, is the code of moral principles which the knights were required or instructed to observe. It is not a written code; at best it consists of a few maxims handed down from mouth to mouth or coming from the pen of some well-known warrior or savant. More frequently it is a code unuttered and unwritten, possessing all the more the powerful sanction of veritable deed, and of a law written on the fleshly tablets of the heart. It was founded not on the creation of one brain, however able, or on the life of a single personage, however renowned.It was an organic growth of decades and centuries of military career.
＊Inazo Nitobe(1900)Bushido:The Soul of Japan