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If you want to learn the craft of war, ponder over this book. The teacher is as a needle, the disciple is as thread. You must practice constantly.

Miyamoto Musashi (2013). “The Book of Five Rings: A Text on Kenjutsu and the Martial Arts in General, Written by the Swordsman Miyamoto Musashi”, p.24, Lulu Press, Inc
If you want to learn the craft of war, ponder over this book. The teacher is as a needle, the disciple is as thread. You must practice constantly.