Grace

“She nodded, or rocked, or both. “It’s a stable number, three. Fives and sevens are good, too, but three is the best. Things are always growing to three or shrinking to three. Best to start there. Two is a terrible number. Two is for rivalry and fighting and murder.”
“Or marriage,” Adam said, thinking.
“Same thing,” Persephone replied.”
― Maggie Stiefvater, Blue Lily, Lily Blue