" There has always been a sliver of panic in him, deeply buried, when it comes to his daughter: a fear that he is no good as a father, that he is doing everything wrong. That he never quite understood the rules. All those Parisian mothers pushing buggies through the Jardin des Plantes or holding up cardigans in department stores—it seemed to him that those women nodded to each other as they passed, as though each possessed some secret knowledge that he did not. How do you ever know for certain that you are doing the right thing? "

― Anthony Doerr , All the Light We Cannot See