" Gansey and Adam shared some sort of private conversation with their eyes. It was the sort of thing Blue was used to transpiring between her mother and Persephone or Calla, and she hadn’t thought anyone else really capable of it. It also made her feel strangely jealous; she wanted something like that, a bond strong enough to transcend words. "

― Maggie Stiefvater , The Raven Boys (The Raven Cycle, #1)