'The practitioner of ninjutsu can gain the strength and invincibility that permit the enjoyment of flowers moving in the wind, appreciation of the love of others, and the contentment of the presence of peace in society. Born of insight attained from repeated exposure to the very brink between life and death, ninpo's benevolent heart is the key to finding harmony and understanding in the realms of the spiritual. and material worlds.'
- Masaaki Hatsumi, Grandmaster Bujinkan