To know and to act are one and the same.
Tomorrow’s battle is won during today’s practice.
Control your emotion or it will control you.
Conqueror the self and you will conquer the opponent.
Control of mental conduct, not skill, is the sign of a matured samurai.
I have no friends; I make my mind my friend.
I have no sword; I make no-mind my sword.
I have no (set) principles; I make adaptability to all circumstances my principle.
Put faith in your own abilities and not in the stars.