Some people spend their whole lives looking for themselves, yet our self is the one thing we surely cannot lose (how like a cheap philosopher I am become, staying in this benighted place). From the moment we are conceived it is the pattern in our blood and our bones are printed through with it like sticks of seaside rock. Nora, on the other hand, says that she's surprised anyone knows who they are, considering that every cell and molecule in our bodies has been replaced many times over since we were born.