3 ideas
The same sword that cuts down one wicked person can preserve the lives of ten thousand, so the weapon is judged by the order it restores, not by the act of killing. The strategist uses force to end disorder and then puts it away. On this view, statecraft is swordsmanship scaled up: one decisive, well-timed action prevents much larger violence.
If attention settles on any single thing, such as the opponent's sword, your own technique, or the wish to win, the mind freezes there and cannot respond to what comes next. Even the resolve to rid yourself of attachment is itself an attachment. The aim is a no-mind (mushin) state in which awareness moves freely through the whole situation without lodging anywhere.
Skipping the learning stage produces emptiness without capability. Stopping at the learning stage produces a practitioner hobbled by the self-consciousness of knowing. Only practice that goes all the way through training into forgetting yields spontaneous action.