Ursula K. Le Guin Quote

I never thought before, said Tirin unruffled, of the fact that there are people sitting on a hill, up there, on Urras, looking at Anarres, at us, and saying, 'Look there's the Moon.' Our earth is their Moon; our Moon is their earth.Where, then, is Truth? declaimed Bedap, and yawned.In the hill one happens to be sitting on, said Tirin.