Miyamoto Musashi's Go Rin no Sho or the book of five rings, is considered a classic treatise on military strategy, much like Sun Tzu's The Art of War and Chanakya's Arthashastra.
The five “books” refer to the idea that there are different elements of battle, just as there are different physical elements in life, as described by Buddhism, Shinto, and other Eastern religions. Through the book Musashi defends his thesis: a man who conquers himself is ready to take it on on the world, should need arise.
It's funny how I've been introduced to Musashi through a manga and how much of an impact it had on my life and my views of the world. The book might sound like it's for "martial arts/warriors" but it's not directed at one group of people, instead it teaches men and women how to find their way in life and in their endeavours, one does not need to be a samurai or warrior to read these texts and find valuable knowledge.
In this world it is said, "One inch gives the hand advantage", but these are the idle words of one who does not know strategy. It shows the inferior strategy of a weak spirit that men should be dependent on the length of their sword, fighting from a distance without the benefit of strategy.
Whenever you parry, hit, spring, strike or touch the enemy's cutting sword, you must cut the enemy in the same movement. It is essential to attain this. If you think only of hitting, springing, striking or touching the enemy, you will not be able actually to cut him.