I became a psychologist because I understand trauma; I understand it in a way that no amount of schooling could ever teach. I understand the way the brain can fundamentally fuck with every other aspect of your body.
-- Chloe (Chapter 7)

Importance: Becoming a psychologist is Chloe's way of dealing with her childhood trauma. This quote is important because it explains Chloe's reason for her choice in career.

Be good.
-- Dick Davis (Chapter 8)

Importance: This is the last thing their father ever says before being taken away by the police. This quote is important because it reveals that Dick Davis hoped Cooper would stop killing if his father took the blame for his crimes.

I could go days, weeks, months without a pill or a glass of wine or any kind of chemical substance to numb the constant fear vibrating through my veins; it’s like a plucked guitar string reverberating through my bones, making them rattle. But...
-- Chloe (Chapter 9)