This quote was important because this was the second time Darcy proposed to Elizabeth and this is when the reader finds out that Elizabeth is marrying Darcy for love not because of money or property.
The other important marriage in the book is between Jane and Mr. Bingley. Jane is the sister of Elizabeth, she is the oldest and the most beautiful of the Bennett's. Jane is more quite and shy that Elizabeth, but has never said anything bad about someone else and always thinks the best of others. Charles Bingley who is Darcy's friend is also very wealthy but, sees no difference in people from different classes. Both of them are always cheerful, friendly and good natured. They fit together perfect, these are the two people that are thought to get married throughout the whole book. People would think that Jane wouldn't be in love with Bingley rather than wanting to marry him so she could get the estate of Netherfield that Bingley recently purchased.
In this novel the author Jane Austen is trying to say that people can't live happily alone. We can learn about people by the way they marry and who they marry. We learn that Charles Bingley is very mature because he can see past that Jane is not as rich as he is and that she is in a lower class than him. Eventually Mr. Darcy saw past the difference in their classes and we learned that he grew up and got married for love. Austen also portrays in the novel that the other route of happiness is money and fortune. She portrays this by the marriage of Lydia and Wickham they did not marry for love, but they married so that Lydia would become rich and could own his property. We learn from this marriage that Lydia does not care about love and will get married just for the fact that she has money, she could be miserable for the rest of her life but still chooses to marry Wickham.