How we cite our quotes: (Volume.Chapter.Paragraph)
Quote #1
[A]lthough it was below the expectations which many of Edith's acquaintances had formed for her, a young and pretty heiress. But Mrs. Shaw said that her only child should marry for love—and sighed emphatically, as if love had not been her motive for marrying the general. (1.1.4)
Mrs. Shaw regrets the fact that when she was younger, she married for wealth and status instead of for love. Now she hopes that her daughter Edith will marry out of love, although she's worried that Edith picked a man based on status.
Quote #2
"Margaret," said he, looking into her eyes, which met his with their open, straight look, expressive of the utmost faith and reluctance to give pain, "Do you"—he was going to say—"love anyone else?" But it seemed as if this question would be an insult to the pure serenity of those eyes. (1.3.50)
After getting rejected by Margaret, Henry Lennox wants to know if she is in love with any other man. It's a fairly natural thing to ask, although it's not clear whether Henry wants to hear a yes or a no. In any case, he doesn't bother asking… the question is just too hard to ask.
Quote #3
"Margaret, don't despise me; I have a heart, notwithstanding all this good-for-nothing way of talking. As a proof of it, I believe I love you more than ever—if I do not hate you—for the disdain with which you have listened to me during this last half-hour. Goodbye Margaret—Margaret!" (1.3.63)
Henry Lennox might be a practical guy, but love can turn anyone into a poet. In this case, he bids Margaret farewell and prepares to wander the Earth, cold and lonely, for the rest of his heartbroken life. Or, you know, something like that.