Every creature has fear, Jared said. Even the non-conscious ones.
No, Boutin said. Every creature has a survival instinct. It looks like fear but it's not the same thing. Fear isn't the desire to avoid death or pain. Fear is rooted in the knowledge that what you recognize as yourself can cease to exist. Fear is existential.

Chapter 13 (p. 286) - The Ghost Brigades (2006)