Japanese swordsman, philosopher, strategist, writer, artist, and rōnin (1584–1645)
Miyamoto Musashi 宮本 武蔵 (c. 1584 – 13 June 1645) was a famous Japanese swordsman, believed to have been one of the most skilled swordsmen in history. He founded the Hyoho Niten Ichi-ryu, or Nito Ryu style of swordsmanship and wrote Go Rin No Sho (The Book of Five Rings) a classic work on strategy, tactics, and philosophy.
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The heart of Stepping on the Sword, something used principally in the martial arts, is that even with bows and firearms, you must act quickly while they are being discharged: if you charge quickly, it will be difficult to notch another arrow to a bow or discharge a firearm. In all things, when your opponent sets up a tactic, respond to it immediately according to its own principles and, stepping on his actions, defeat him...This is, therefore, the mind of taking the initiative in everything. It does not mean attacking at the same time as your opponent. Stepping on the Sword is taking your action immediately upon your opponent's action.
In short, it is difficult for large numbers of men to change position, so their movements can be easily predicted. An individual can easily change his mind, so his movements are difficult to predict. You must appreciate this. The essence of this book is that you must train day and night in order to make quick decisions.
1. Do not think dishonestly. 2. The Way is in training. 3. Become acquainted with every art. 4. Know the Ways of all professions. 5. Distinguish between gain and loss in worldly matters. 6. Develop intuitive judgement and understanding for everything. 7. Perceive those things which cannot be seen. 8. Pay attention even to trifles. 9. Do nothing which is of no use.