“What about guns with sensors in the handles that could detect if you were angry, and if you were, they wouldn't fire, even if you were a police officer?What about skyscrapers made with moving parts, so they could rearrange themselves when they had to, and even open holes in their middles for planes to fly through?”

“When I looked at you, my life made sense. Even the bad things made sense. They were necessary to make you possible.”

“What about a device that knew everyone you knew? So when an ambulance went down the street, a big sign on the roof could flashDON’T WORRY! DON’T WORRY!if the sick person’s device didn’t detect the device of someone he knew nearby. And if the device did detect the device of someone he knew, the ambulance could flash the name of the person in the ambulance, and eitherIT’S NOTHING MAJOR! IT’S NOTHING MAJOR!Or, if it was something major,IT’S MAJOR! IT’S MAJOR!And maybe you could rate the people you knew by how much you loved them, so if the person in the ambulance detected the device of the person he loved the most, or the person who loved him the most, and the person in the ambulance was really badly hurt, and might even die, the ambulance could flashGOODBYE! I LOVE YOU! GOODBYE! I LOVE YOU!One thing that’s nice to think about is someone who was the first person on lot’s of people’s lists, so that when he was dying, and his ambulance went down the streets to the hospital, the whole time it would flashGOODBYE! I LOVE YOU! GOODBYE! I LOVE YOU!”

“I read the first chapter of A Brief History of Time when Dad was still alive, and I got incredibly heavy boots about how relatively insignificant life is, and how compared to the universe and compared to time, it didn't even matter if I existed at all. When Dad was tucking me in that night and we were talking about the book, I asked if he could think of a solution to that problem. "Which problem?" "The problem of how relatively insignificant we are." He said, "Well, what would happen if a plane dropped you in the middle of the Sahara Desert and you picked up a single grain of sand with tweezers and moved it one millimeter?" I said, "I'd probably die of dehydration." He said, "I just mean right then, when you moved that single grain of sand. What would that mean?" I said, "I dunno, what?" He said, "Think about it." I thought about it. "I guess I would have moved one grain of sand." "Which would mean?" "Which would mean I moved a grain of sand?" "Which would mean you changed the Sahara." "So?" "So? So the Sahara is a vast desert. And it has existed for millions of years. And you changed it!" "That's true!" I said, sitting up. "I changed the Sahara!" "Which means?" he said. "What? Tell me." "Well I'm not talking about painting the Mona Lisa or curing cancer. I'm just talking about moving that one grain of sand one millimeter." "Yeah? If you hadn't done it, human history would have been one way..." "Uh-huh?" "But you did do it, so...?" I stood on the bed, pointing one of my fingers at the fake stars, and screamed: "I changed the course of human history!" "That's right." "I changed the universe!" "You did." "I'm God!" "You're an atheist." "I don't exist!" I fell back onto the bed, into his arms, and we cracked up together.”

“A map such as that one is worth many hundreds, and as luck will have it, thousands of dollars. But more than this, it is a remembrance of that time before our planet was so small. When this map was made, I thought, you could live without knowing where you were not living.”

“What about the teakettle? What if the spout opened and closed when the steam came out, so it would become a mouth, and it could whistle pretty melodies, or do Shakespeare, or just crack up with me.”

“What about little microphones? What if everyone swallowed them, and they played the sounds of our hearts through little speakers, which could be in the pouches of our overalls? When you skateboarded down the street at night you could hear everyone's heartbeat, and they could hear yours, sort of like sonar. One weird thing is, I wonder if everyone's hearts would start to beat at the same time, like how women who live together have their menstrual periods at the same time, which I know about, but don't really want to know about. That would be so weird, except that the place in the hospital where babies are born would sound like a crystal chandelier in a houseboat, because the babies wouldn't have had time to match up their heartbeats yet. And at the finish line at the end of the New York City Marathon it would sound like war.”