From Batman Begins
You have learned to bury your guilt with anger. I will teach you to confront it, and to face the truth. You know how to fight six men. We can teach you how to engage six hundred. You know how to disappear. We can teach you to become truly invisible.
[Ducard shouts in a different language and 2 people dressed in black flip down from the ceiling
] A Ninja understands that invisibility is a matter of patience... and agility.