I don't believe that 'you' (the reader) are the intended 'author' of the play in that quote. It's not that you get to write your own role, it's that it's your j

I don't believe that 'you' (the reader) are the intended 'author' of the play in that quote. It's not that you get to write your own role, it's that it's your job to play the role you were given, and someone else's job to give you that role.