From 3 Ninjas
Colt, what is a ninja?
A ninja is one who can use everything around him to trick his enemies. He and fast and he is friendly to his environment.
A ninja is honest and good. His mind, body and spirit are one. He has self-control. He has discipline.
A ninja loves nature, uh, 'cause he is part of nature. A ninja never fights a battle if he cannot win.