Miyamoto Musashi, the master swordsman. Perhaps the master swordsman of the history, fighting - bit oddly - always with two swords. He wrote a master piece on swordsmanship, The Book of Five Rings, which is, much like Sun Tzu’s work, easy to interpret even in our time and age and almost any line of work; it was not a technical book on how to wield sword, but a philosophical ponderings on the spiritual stance of the warrior.

Today you triumph over yourself of the yesterday; you have improved your skills, you have become better. Thus winning over your old, former self, becoming better, stronger, faster, you will ensure your victory over life in general and any foe in particular.

Words of wisdom to live by.