World War Z
How we cite our quotes:
It's comforting to see children again, I mean those who were born after the war, real children who know nothing but a world that includes the living dead. They know not to play near water, not to go out alone or after dark in the spring or summer. They don't know to be afraid, and that is the greatest gift, the only gift we can leave to them. (9.6.2)
The novel's ending suggests that the thing you fear can eventually become a typical part of your everyday life. After an undead apocalypse, that's about as happy an ending as you can hope for.