You can abandon your own body, but never let go of your honor.
If you merely read this book you will not reach the Way of strategy. Absorb the things written in this book. Do not just read, memorise or imitate, but so that you realise the principle from within your own heart study hard to absorb these things into your body.
You win in battles with the timing in the Void born of the timing of cunning by knowing the enemies' timing, and this using a timing which the enemy does not expect. All the five books are chiefly concerned with timing. You must train sufficiently to appreciate all this.
In strategy you must know the Ways of other schools, so I have written about various other traditions of strategy in this the Wind Book.
To move the shade is used when you cannot see the enemy's spirit. In large-scale strategy, when you cannot see the enemy's position, indicate that you are about to attack strongly, to discover his resources. It is easy then to defeat hin with a different method once you see his resources.
There are various kinds of spirit involved in letting go the hilt. There is the spirit of winning without a sword. There is also the spirit of holding the long sword but not winning. The various methods cannot be expressed in writing. You must train well.
Speed is not part of the true Way of strategy. Speed implies that things seem fast or slow, according to whether or not they are in rhythm. Whatever the Way, the master of strategy does not appear fast.
Just as a horse must have endurance and no defects, so it is with weapons. Horses should walk strongly, and swords and companion swords should cut strongly. Spears and halberds must stand up to heavy use: bows and guns must be sturdy. Weapons should be hardy rather than decorative.
These things cannot be explained in detail. From one thing, know ten thousand things. When you attain the Way of strategy there will not be one thing you cannot see. You must study hard.
There is timing in everything. Timing in strategy cannot be mastered without a great deal of practice.
You can win with certainty with the spirit of one cut. It is difficult to attain this if you do not learn strategy well. If you train well in this Way, strategy will come from your heart and you will be able to win at will. You must train diligently.
In this the Fire Book of the NiTo Ichi school of strategy I describe fighting as fire.
When you have mastered the Way of strategy you can suddenly make your body like a rock, and ten thousand things cannot touch you. This is the body of a rock. You will not be moved.
The Ni To Ichi Way of strategy is recorded in this the Book of the Void.