"It's a wise fear," Ibiki answered; Itachi was settling into better behavior now, and he was willing to teach a little. He settled himself comfortably, leaning against a tree, facing the boy. "Fear exists to keep prey alive and safe. To work properly, it has to work before they confront the danger. My reputation tells them that I'm a predator, and so they fear me, as they ought." It was really beautiful, how fear worked -- the most valuable natural impulse, to his way of thinking.