"But depend upon it, Mr. Collins," she added, "that Lizzy shall be brought to reason. I will speak to her about it myself directly. She is a very headstrong, foolish girl, and does not know her own interest; but I will make her know it."

– Jane Austen

Pride and Prejudice, Chapter 20. When Elizabeth turns down Mr. Collins’s offer of marriage, Mrs. Bennet assures him that she will have strong words with her to make her see reason. Mrs. Bennet just wants to get her daughters married and doesn’t care who or how suitable a man they marry. Her description of Elizabeth as being "headstrong" is rather accurate and is repeated later in the story when Elizabeth clashes with Lady Catherine de Bourgh: "Obstinate, headstrong girl!"