I don't do as much deep thinking as I used to. When I was a kid, I remember imagining what it would be like if the universe was symmetrical, mirrored right down the middle. I imagined a white room, floating in space, right on the plane that separates the two halves of the universe. If you parked your spaceship outside and opened the door, you would see yourself in front of you, opening the same door. It would be the you from the other side of the universe.
