When someone believes in something," Mama said, "you can't just take it away. You have to give them something to replace it. And since I don't know what makes women barren, I've got nothing to give."
-- Ada's Mother (chapter 1)

Importance: This observation is central to North's novel. It provides an explanation for the superstitions and prejudices harbored by the inhabitants of Fairchild who judge Ada, the doctors and clergymen whose books she reads, and the random individuals of all ages and walks of life she encounters. It is not an excuse or a justification, but a matter-of-fact statement which opens the door to Ada's quest for greater knowledge.

Mama says at every birth, death is in the room. You can try to ignore it, or you can acknowledge it, greet it like a guest, and then you won't be so afraid anymore.
-- Ada (chapter 1)

Importance: Early death, particularly from childbirth, is a common occurrence in the 1890s...