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.

People didn't make life, so they can't destroy it. Even if we were to wipe out every bit of life in the world, we can't touch the place life comes from. Whatever made the plants and animals and people spring up in the first place will always be there, and life will spring up again.

The idea seemed to be that if you prayed extremely hard--especially if a lot of people prayed at once--maybe God would change things. The trouble was, what if your enemy was praying, too? Which prayer would God listen to?

They lifted their faces to the astonishing warmth. The sky arched over them, a pale, clear blue. Lina felt as though a lid that had been on her all her life had been lifted off. Light and air rushed though her, making a song, like the songs of Ember, only it was a song of joy. She looked at Doon and saw that he was smiling and crying at the same time, and she realized that she was, too.

It would be something that another person had written down without understanding its significance; just a sentence or two that would be like a flash of light.

He says I'm beautiful as a red tomato

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.