" In my opinion, it is in the smile of a face that the essence of what we call beauty lies. If the smile heightens the charm of the face, then the face is a beautiful one. If the smile does not alter the face, then the face is an ordinary one. But if the smile spoils the face, then the face is an ugly one indeed. Mamma "

― Leo Tolstoy , Leo Tolstoy: The Complete Novels and Novellas (Book House)