In my experience, commitment leads to expectations, and expectations lead to lies, and hurt, and disappointment-stuff I'd rather not experience, or force others to experience.
-- Mallory (chapter 6)

Importance: In this quote, Mallory reflects on her tendency to choose casual sexual relationships over monogamous, romantic ones. Mallory’s detachment reflects her trauma regarding her father’s affair. Also, her reluctance to take on a new commitment reveals her suppressed stress surrounding her role as a caregiver for her sisters.

Because when I’m with you, Mallory, everything is different. When I’m with you, I want to play more than I want to win.
-- Nolan (chapter 20)

Importance: Nolan says this to Mallory, explaining how he feels when they play chess together. This, coming from the number one professional chess player in the world, is naturally a high compliment. That Mallory’s talent inspires Nolan to set aside his competitiveness and enjoy the game shows her profound impact...