If you do not let go of thinking about forms, you will not understand what I am showing.
Forget your sadness, anger, grudges and hatred. Let them pass like smoke caught in a breeze. Do not indulge yourself in such feelings.
Budo is simply the study of the best ways to kill.
Always be able to kill your students
The first priority to the ninja is to win without fighting.
Focus on the future for 50%, on the present for 40%, and on the past for 10%