The development of our personalities doesn’t take place in isolation, but in relationship with others - we are shaped and completed by unseen, unremembered forces; namely, our parents. This is frightening for obvious reasons. Who knows what indignities we suffered, what torments and abuses, in this land before memory? Our character was formed without our even knowing it.
-- Theo (Part 1: Chapter 2)

Importance: This quote establishes the concept that people are not born insane, but instead develop insanity based on their life and childhood experiences. This is not an idea that is universally accepted, as Theo himself mentions that some believe personalities are decided at birth. This is a prevalent theme throughout the entire novel, as both Theo and Alicia have memorable moments from their past that changes their perceptions as adults. This idea drives Theo’s therapy sessions with Alicia and drives him to justify each character’s motives, including Paul, Alicia, and...