Dan: You know why we have lighthouses?
Child: Because they're neat?
Dan: That's right, yes. And also because they help when it's dark out. They help keep boats safe, and they help us from crashing into rocks. Because, when you're out there, and you're being tossed back and forth by those big dark waves, and you think that you'll never feel land again, and that you could just split into a million pieces, and just sink down all the way down into the deep, it's the light that keeps us on course. It's the light.