Miyamoto Musashi, the greatest swordsman to ever exist, spent his entire life practicing his fighting skill. But not only he was a Samurai, he was a strategist, a writer and philosopher.

The book of five rings has five manuscripts, which express different perspectives in which a situation can develop, allowing through advice, strategies and tactics to get the most advantage of the circumstance.

The introductory manuscript teaches the path of strategy and establishes the spirit and moral requirements for understand this journey. He also compares the warrior's path with others jobs, like a merchant or a craftsman.

It tells us about the attitude of a warrior in front of the circumstances, highlights the management not only of your body but of your mind. Within this manuscript are teachings not only applicable for a battle, but for life: the importance to remain calm in situations of great stress and chaos, always have balance, and self control.

He talks about using the environment in which you are fighting, to control the mood of your opponents and apply them efficiently to deceive your rival and surprise him, among others.

Musashi compares his school with others of the time. Bring out the errors in these, which through old traditions, limits the growth of the disciples, giving them more importance to aspects such as protocol, being cutting edge or having great recognition, leaving aside the true growth in the disciple's abilities.

Miyamoto teaches the meaning of the void, which in some sports is known as the zone or 'Flow state', the moment in which a person enters a state of concentration in which he applies their knowledge unconsciously. He speaks of a mental emptiness, an absolute concentration in the moment, where there is nothing but the teachings attached in the subconscious.