"Achieve the spirit of the warrior.
Today is victory over yourself of yesterday.
Tomorrow is your victory over lesser men."

Miyamoto Musashi

Go Rin No Sho : The Book of Five Rings
One of Japan's great samurai sword masters penned in decisive, unfaltering terms this certain path to victory, and like Sun Tzu's The Art of War it is applicable not only on the battlefield but also in all forms of competition.
Always observant, creating confusion, striking at vulnerabilities--these are some of the basic principles.
Going deeper, we find the interval of vulnerability, of indecisiveness, of rest,
the briefest but most vital moment to strike.
In succinct detail, Miyamoto records ideal postures, blows, and psychological tactics to put the enemy off guard and open the way for attack.
Most important of all is Miyamoto's concept of rhythm, how all things are in harmony, and that by working with the rhythm of a situation we can turn it to our advantage with little effort.

This is the Way for men who want to learn my strategy:
* Do not think dishonestly.
* The Way is in training.
* Become acquainted with every art.
* Know the Ways of all professions.
* Distinguish between gain and loss in worldly matters.
* Develop intuitive judgment and understanding for everything.
* Perceive those things which cannot be seen.
* Pay attention even to trifles.
* Do nothing which is of no use.

Originally Posted By: Miyamoto Musashi
By knowing things that exist, you can know that which does not exist.
That is the void.
People in this world look at things mistakenly, and think that what they do not understand must be the void.
This is not the true void. It is bewilderment.
Both in fighting and in everyday life you should be determined though calm.
Meet the situation without tenseness yet not recklessly, your spirit settled yet unbiased.
Even when your spirit is calm do not let your body relax, and when your body is relaxed do not let your spirit slacken.
With your spirit settled, accumulate practice day by day, and hour by hour.
Polish the twofold spirit heart and mind, and sharpen the twofold gaze perception and sight.
When your spirit is not in the least clouded, when the clouds of bewilderment clear away, there is the true void.

Miyamoto Musashi,
also known as Shinmen Takezoo, Miyamoto Bennosuke,
or by his Buddhist name Niten Dooraku,
was a Japanese swordsman famed for his duels and distinctive style.
Musashi, as he is often simply known, gives his full name and title in Gorin no Sho as Shinmen Musashi-no-Kami Fujiwara no Genshin.
He became legendary through his outstanding swordsmanship in numerous duels, even from a very young age.
He is the founder of the Hyoohoo Niten Ichi-ryuu or Niten-ryuu style of swordsmanship and the author of The Book of Five Rings (Go Rin No Sho), a book on strategy, tactics, and philosophy that is still studied today.

you can read the book here:
http://www.uvm.edu/Strategy Books/Book of Five Rings - Musashi.pdf

"An elevated spirit is weak and a low spirit is weak.
Do not let the enemy see your spirit.
You must make the best of the situation,
see through the enemy's spirit
so that you grasp his strategy and defeat him."

Miyamoto Musashi