Parson Adams figures out that Joseph isn't totally dumb. His illustrious father, Mr. Andrews, taught him how to read and work hard at everything in life.
Mrs. Slipslop, Lady Booby's gentlewoman-in-waiting, often argues with the good parson about theology. She uses big words to make herself sound smart.
Even though Joseph gets whisked away from the country and off to London to be Lady Booby's footman, he's super grateful that Parson Adams has been so kind to him.