People see a Macbeth film. They imagine they have seen Macbeth, and don't want to see it again; so when your Mr. Hackett or somebody comes round to act the play, he finds the house empty. That is what has happened to dozens of good plays whose authors have allowed them to be filmed. It shall not happen to mine if I can help it.
George Bernard Shaw, Authors on Film
adaptation, cinema, film, macbeth