he looked at me without letting go of Peewee and her great soft eyes were sternly sad. ("It means that their planet is tilted ninety degrees out of the space-time of your senses and mine.")
Her voice sounded like a funeral dirge played softly on a flute. Yet the verdict did not seem tragic to me. I knew what she meant; her meaning was even clearer in Vegan than in English. If you rotate a plane figure about an axis in its plane – it disappears. It is no longer in a plane and Mr. A. Square of Flatland is permanently out of touch with it...
("You do not understand, dear gentle Kip -- they do not take their star with them.")
Good story :)
Heh, a classic indeed. One of my favorite Heinlein's and that's saying a lot. I especially love the bit about education at the beginning - I bet Heinlein would have liked homeschooling.