Your life is on the line, practice well.

The first priority to the ninja is to win without fighting.

Looking for the meaning of life, one man can discover the order of the universe. To discover the truth, to achieve. a higher spiritual state, that is the true meaning of ninja.

Forget your sadness, anger, grudges and hatred. Let them pass like smoke caught in a breeze. Do not indulge yourself in such feelings.

It's important to make an effort under any circumstance - stagnant, sickness, being in an unstable lifestyle, even when society is insane. You should consider such periods as an omen before you move. When you are stuck on something, it is important to hold to your purpose but not press onward against the current. When you can't move at all, try to concentrate, continuing forward as if in a boat switching to a stronger motor. The keiko that is most important when you cannot move is kage no keiko [shadow training].

Always be able to kill your students

Focus on the future for 50%, on the present for 40%, and on the past for 10%