“To get from you to the tree, the rock has to be halfway in between you and the tree, doesn’t it. And then it has to be halfway between halfway and the tree. And then it has to be halfway between that and the tree. It doesn’t matter how far it’s gone, there’s always a place, only it’s a time really, that’s halfway between the last place it was and the tree—”

from “The Dispossessed”, Ursula K. Le Guin