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These things being said, as I was giving Lucius his turn to follow and continue the discourse,—there being nothing left to be added but the demonstrations of this doctrine,—Aristotle smiling said: I am a witness, that you have directed all your contradictions and all your refutations against those who, supposing the moon to be half fire, affirm in general that all bodies do of their own accord tend either upwards or downwards; but if there is any one who holds that the stars have of their own nature a circular motion, and that they are of a substance wholly different from the four elements, you have not thought of saying any thing, so much as accidentally or by the way, against him; and therefore I am wholly unconcerned in your discourse.