For you see at the very first blush, how impertinent his opinion is who said, that the form appearing in the moon is an accident of our sight, by its weakness giving way to her brightness, which we call the dazzling of our eyes; for he perceives not that this should rather befall our looking against the sun, whose lustre is more resplendent, and whose rays are more quick and piercing; as Empedocles also in a certain passage of his has not unpleasantly noted the difference of these two planets, saying, The sharp-rayed sun, and gently shining moon. For thus does he call her alluring, favorable, and harmless light. No less absurd appears the reason he afterwards gives why dull and weak eyes discern no difference of form in the moon, her orb appearing to them plain and smooth, whereas those whose sight is more acute and penetrating better descry the lineaments and more perfectly observe the impressions of a face, and more evidently distinguish its different parts. For it should, in my opinion, be quite contrary, if this were a fancy caused by the weakness of the vanquished sight; so that where the patient’s eye is weaker, the appearance would be more express and evident. Moreover, the inequality every way confutes this reason; for this face is not seen in a continuance and confused shadow, but the poet Agesianax not unelegantly describes it, saying, With shining fire it circled does appear, And in the midst is seen the visage clear Of a young maid, whose eyes more gray than blue, Her brow and cheeks a blushing red do show. For indeed dark and shady things, encompassed with others that are bright and shining, sink underneath and reciprocally rise again, being repelled by them; and in a word, they are so interlaced one within another, that they represent the figure of a face painted to the life; and there seems to have been great probability in that which was spoken against your Clearchus, my dear Aristotle. For he appears not inconveniently to be called yours, for he was intimately acquainted with the ancient Aristotle, although he perverted many of the Peripatetic doctrines.