“But as Joan had taken each small step forward, the world had kept spinning on its axis. Days had formed into weeks and months and years, which people marked with watches and calendars, all based on the only thing they had to tell what time it was: the stars. As the Earth orbits the sun, it shifts toward the sun’s warm embrace. Then summer turns to fall, fall to winter. Soon it loops back around, and winter thaws to spring, spring to summer. Through it all, babies are born from stardust and grow taller. They begin to walk and talk and learn the days of the week, the months, the seasons. Then they look up at the sky, to see where they came from. And the adults spend most of their days looking down. They fall in love and make mistakes and learn new things and feel tired. They lose people they love, and fail themselves, and change or never change. They get new jobs and fall out of love and convince themselves that if they just get this one thing, they will finally be happy. Day in and day out, the Earth keeps spinning and revolving and sailing through the Milky Way. That is why time never stands still.”