22
At this I, smiling upon him, said: You have done me a pleasure, dear Apollonides, in having found out such a demonstration by which you will prove that you and I shall be bigger than those giant sons of Aloeus,Otus and Ephialtes.—not indeed every hour of the day, but principally morning and evening,—if indeed you think that, when the sun makes our shadows so long, he suggests to our minds this goodly argument; if that which is shadowed is great, that which shadows must of necessity be yet excessively greater. I know well that neither you nor I have ever been in Lemnos; yet we have often heard that Iambic verse, so frequent in every one’s mouth: Mount Athos’ shade shall hide the Lemnian cow. For the shadow of that mountain falls, as it seems, on the image of a brazen heifer which is in Lemnos, extending itself in length over the sea not less than seven hundred stadia. The mountain which makes the shadow causes it, because the distance of the light renders the shadow of bodies manifoldly greater than the bodies themselves. Consider then here, that when the moon is in the full, and shows us the form of a visage most expressly, by reason of the profundity of the shadow, it is then that she is most remote from the sun; for it is the distance of the light that makes the shadow bigger, and not the greatness of the inequalities which are on the superficies of the moon. And you moreover see, that the brightness of the sun’s beams suffers not the tops of the mountains to be discerned in open day; but on the contrary, the deep hollow and shadowy parts appear from afar. It is not therefore any way absurd or strange, if we cannot so exactly see how the illumination of the moon and her reception of the sunbeams take place, while yet the conjunction of things that are obscure and dark to such as are clear and shining is by reason of this diversity apparent to our sight.
