I must have my share in the conversation if you are speaking of music. There are few people in England, I suppose, who have more true enjoyment of music than myself, or a better natural taste. If I had ever learnt, I should have been a great proficient.

– Jane Austen

Pride and Prejudice, Chapter 31. Lady Catherine de Bourgh admits that she cannot play a musical instrument, but claims to be an expert on music. She believes that she would have been a great musician, had she learned. Austen is poking fun here at the "great" lady and her arrogance.