In Chapter 9 of The Time of the Butterflies, what is a powerful quotation and why?

The chapter concludes with: “A dark night was falling, one of a different order from the soft, large, kind ones of childhood under the anacahuita tree, Papa parceling out futures and Mama fussing at this drinking.  This one was something else, the center of hell maybe, the premonition of which made Dede draw closer to Jaimito until she, too, fell asleep.”  This is important because it refers back to Dede’s story in Chapter One, which talks about the time before “the darkness” fell, the time when things were still good, characterized by the family sitting outside, under the anacahuita tree,  talking about the future, just a little conscious but not overly worried about the stranglehold Trujillo held over the country. In this present scene Dede is frightened because the SIM have arrested many in her family, and her own marriage almost broke up, although now she feels somewhat safe lying in bed next to her husband. In bed next to him she feels a moment of safety that she knows is not safe at all, because she realizes the extent of the revolution, is afraid of the events that will inevitably happen, and she feels helpless to hold back the terrifying future.