Performance
Letters to swordsmen explore attention that moves freely without fixing on fear, technique, or opponent.
The moment the mind settles on one thing, such as the opponent's blade, the rhythm of the fight, or even your own sword, that thing takes hold of you. Once fixed, your thoughts fill with judgments and stir, so you can no longer respond freely. Seeing something without stopping on it is what the author calls the immovable mind.
Focusing on a single red leaf hides all the other leaves on the tree. Facing the tree with nothing fixed in mind lets you see countless leaves at once. In the same way, if the mind stops at one of a thousand arms, the other nine hundred and ninety-nine are useless.
Against ten attackers, you can answer each one properly only if you move from one to the next without the mind lingering on any single action. When you meet an attack without stopping on it or planning a counterstroke, the threat itself can be turned into your advantage.
A mind that stays in no single place is like water and can do water's work. A mind that runs in one direction and stays there is like ice, which cannot wash hands or head. Being stuck is a loss of usefulness, not merely a matter of style.
The novice's discipline is to grip the mind and keep it from wandering into confusion. Applied over a long time, this gripping leads to a freedom where the mind can be let go in any direction. The author warns that a mind held tightly forever is like a cat kept permanently on a string after it once caught a sparrow.
The author treats training in principle and training in technique as the two wheels of a cart. With only one wheel, the cart does not move. Understanding the idea without the practised skill, or the skill without the idea, leaves a person stuck.
Hearing someone else's explanation rarely produces real understanding. How clearly you see depends on how deeply you yourself have worked at it. People who lack this grasp often put on knowing faces and criticise those who have it.
A beginner knows nothing of posture or technique, so his mind snags on nothing and he simply meets the attack. Training brings in self-conscious thought that stops the mind. Long practice eventually dissolves that thought, so the master arrives back at the beginner's unhindered response, now joined to skill.
Clinging begins wherever the mind stops and sticks to something. Knowing that something is wrong but doing it anyway comes from the mind wanting something it has stopped on. Small odd leanings, followed without noticing, can pull a person step by step into bad habits.