"I AM NINJA
My Magic is Training...
My Body is Control...
My Srength is Adaptability...
My Weapons are Everything That Exists...
MY WAY IS NINJUTSU"

Extract from the Ninja's Covenant,
from Jay Sensei's Tiger Scroll of the Koga Ninja

I found this quote referenced in 'Ninja The Shadow Warrior' by Joel Levy. A friend of mine picked up the book from a discount bin at Barnes & Noble and gave it to me. It was an enjoyable quick read.