`You don't believe in me,'' observed the Ghost.
``I don't,'' said Scrooge.
``What evidence would you have of my reality beyond that of your senses?''
``I don't know,'' said Scrooge.
``Why do you doubt your senses?''
``Because,'' said Scrooge, ``a little thing affects them. A slight disorder of the stomach makes them cheats. You may be an undigested bit of beef, a blot of mustard, a crumb of cheese, a fragment of an underdone potato. There's more of gravy than of grave about you, whatever you are!'' - Dickens