Margaret Mitchell said this quote

But there was a difference in their hardness and hers and just what the difference was, she could not, for the moment, tell. Perhaps it was that there was nothing she would not do, and there were so many things these people would rather die than do. Perhaps it was that they were without hope but still smiling at life, bowing gracefully and passing it by. And this Scarlett could not do. She could not ignore life. She had to live it and it was too brutal, too hostile, for her even to try to gloss over its harshness with a smile. Of the sweetness and courage and unyielding pride of her friends, Scarlett saw nothing. She saw only a silly stiff-neckedness which observed facts but smiled and refused to look them in the face.