The City of Ember

by Jeanne DuPrau

The trouble with anger is, it gets hold of you. And then you aren’t the master of yourself anymore. Anger is.”

“And when anger is the boss, you get—”

“Unintended consequences.”

“There is so much darkness in Ember, Lina. It’s not just outside, it’s inside us, too. Everyone has some darkness inside. It’s like a hungry creature. It wants and wants and wants with a terrible power. And the more you give it, the bigger and hungrier it gets.”