This text is an extract of the written tradition in the schools included in the Bujinkan, which came along throughout the generations to Soke Hatsumi, in this case, the Yagyu Munenori’s Heiho Ka Densho. Here, there are references to unavoidable concepts for everyone who pretends to face the challenge of going through a martial way.
“… The great lesson shows how to reach the Knowledge and the perfection of all things. The consummation of the Knowledge means to know the principles of everything. The perfection of things means that when you fully know the Principle, you get to know and can do everything. When you don’t know enough, you can’t do. When the Principle is not know, nothing would be fruitful.
The uncertainty exists in all the things because of ignorance. The things get attached to your mind when the doubt begins. When the Principle becomes cleared, nothng gets sticked to your mind. This is called the consummation of the Knowledge and the perfection of things. Since there’s nothing attached to the mind, all tasks come easy to achieve.
Because of that reason, the practice of every art have the goal to clean the contents of the mind. In the beginning , you don’t know anything, in a way that paradoxically you don’t have questions in your mind. Then, when you move forward in your studies, something emerges in the mind and provokes an obstruction.
When what you have studied leaves the mind, and the practice also disappears, then with the practice of your art you achieve the technique easily without concern for what you have learned and, in the meantime, you don’t divert from it. This is to adapt spontaneously to what is acquired without being aware consciously that you are doing that. The art of war science can be understood troughout this…”