Budo is simply the study of the best ways to kill.

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].

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

Any place we can breathe, we can do Ninjutsu.

Those who desire only techniques will never understand this art. It is everything beyond that

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.

Always be able to kill your students