A wise man who cultivates wisdom may sometimes drown in it.

Fighting isn't all there is to the Art of War. The men who think that way, and are satisfied to have food to eat and a place to sleep, are mere vagabonds. A serious student is much more concerned with training his mind and disciplining his spirit than with developing martial skills.

Danger was the grindstone on which the swordsman whetted his spirit. Enemies were teachers in disguise.

Love was like a toothache.

I want to dedicate myself to training and discipline. I want to spend every moment of every day working to improve myself.

It is easy to crush an enemy outside oneself but impossible to defeat an enemy within.

Every act is an expression of one's self.