"I learned that the authorized world doesn't recognize the knife. Your knife is invisible, that's what makes it so convenient to use. See how things work? It's what drives folk to the blackest crimes, and to sickness, I know it; the thing of everyone turning the knife just by saying hello, or something equally innocent-sounding. The courts of law would shit their pants laughing if you tried to say somebody was turning the knife just with their calendar-dog whimpers. But here's why they'd laugh: not because they couldn't see the knife, but because they knew nobody else would buy it. You could stand before twelve good people, all with some kind of psycho-knife stuck in them that loved-ones could twist on a whim, and they wouldn't admit it. They'd forget how things really are, and slip into TV-movie mode where everything has to be obvious. I guarantee it."