From A Swiftly Tilting Planet by Madeleine L’Engle:
You human beings tend to want good things to last forever. They don’t. Not while we’re in time.”
“…Let’s feel the twirling of the earth,” Beezie said, “That’s part of the dance the fireflies are dancing, too. Can you feel it?”
Chuck squeezed his eyelids tightly closed. He gave a little gasp. “Oh, Beezie! I felt as though the earth had tilted!” He sat up, clutching at the rock. “It made me dizzy.”
“…It can be a bit scary, being part of earth and stars and fireflies and clouds and rocks. Lie down again. You won’t fall off, I promise.”