I'm not a doll in the house of my mother's imaginings.
-- Margaret (Part 1, Chapter 1 (Margaret) paragraph 27)

Importance: This quote gives readers some insight as to why she goes ahead and marries John after she learns about his fight with depression. Her engagement to John took her out of the mold of the expected and set her free. She has invested in him. When she hears about his illness, she takes the chance that once he recovers, he will not have a relapse as he had only been in the hospital once before years ago.

John friend's houses. That's where we spend all our vacations.
-- Margaret (Part 1, Chapter 1 (Margaret) paragraph 79)

Importance: This quote indicates that John has somehow disappointed Margaret in two ways. One is in that they cannot afford such a place themselves, but the other is also because he puts on airs and there is a disconnect between the picture John tries to create and the reality of their situation.

And...
-- Celia quoating John (Part 1, Chapter 2 (Celia) paragraph 1)