Teddy told me that in Greek, "nostalgia" literally means, "the pain from an old wound". It's a twinge in your heart, far more powerful than memory alone. This device isn't a spaceship. It's a time machine. It goes backwards, forwards. It takes us to a place where we ache to go again. It's not called the Wheel. It's called a Carousel. It lets us travel the way a child travels. Around and around, and back home again... to a place where we know we are loved.
Don Draper, Mad Men Season Ep 13 Pitching the Kodak Carousel