The way things look...

Wittgenstein: "Tell me, why do people always say it was natural for men to assume that the sun went round the earth rather than that the earth was rotating?"

Friend: "Well, obviously, because it just looks as if the sun is going round the earth."

Wittgenstein: "Well, what would it have looked like if it had looked as if the earth was rotating?"

(ht: Richard Dawkins)