She realized all at once that Doon, thin, dark eyed Doon, with his troublesome temper and his terrible brown jacket, and his good heart---- was the person she knew better than anyone now. He was her best friend. --City of Ember--

It wasn't because they had extraordinary powers, really, but because of how well they used the ordinary powers everyone had: the power of courage, the power of kindness, the powers of curiosity and knowledge.

Maybe there was no happily ever after [...] but there was happiness sometimes and she had it now, doing what she knew she was born for.

Lina couldn't sleep at first, thinking of the old songs and what they meant. Someone, long ago, had hoped that at least a few people would survive and had wanted them to remember her city and the treasure it held, the treasure that was most valuable of all - herself, her family, and all of the generations of people who had lived in that secret place, their purpose, though they didn't know it, to make sure that human beings did not vanish from the world, no matter what happened above.

You know, son, I don't think there's such a thing as an easy life. There's always going to be hard work and there will always be misfortunes we can't control, lurking out at the edges - storms, sickness, wolves. But there is such a thing as a good life and I think that we have one here.

He says I'm beautiful as a red tomato

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.