Forget your sadness, anger, grudges and hatred. Let them pass like smoke caught in a breeze. Do not indulge yourself in such feelings.
The first priority to the ninja is to win without fighting.
Move with your feet, the hands will follow.
No more talk. I'm sick of people talking. Train.
Learning a technique is not an end in itself, it merely indicates where you need to start.
Focus on the future for 50%, on the present for 40%, and on the past for 10%