"Though Mrs. Collins has no instrument, she is very welcome, as I have often told her, to come to Rosings every day, and play on the pianoforte in Mrs. Jenkinson’s room. She would be in nobody’s way, you know, in that part of the house."
Mr. Darcy looked a little ashamed of his aunt’s ill-breeding, an made no answer.
– Jane Austen
Pride and Prejudice, Chapter 31. Lady Catherine, who cannot play the piano, rudely suggests that Elizabeth would not be in the way if she practised piano in the room of her daughter’s companion at Rosings. Lady Catherine uses her social position in society to assert dominance over and demean others. She lacks self-knowledge and self-awareness of her appalling manners. Even Darcy is ashamed of his aunt’s bad breeding.