Plutarch De Facie Quae in orbe Lunae Apparet 29

[29] First they behold the moon as she is in herself ¹ : her magnitude and beauty and nature, which is not simple and unmixed but a blend as it were of star and earth. Just as the earth has become soft by having been mixed with breath and moist[ure] and as blood gives rise to sense-perception in the flesh with which it is commingled, ² so the moon, they say, ³ because it has been permeated through and through by ether is at once animated and fertile and at the same time has the proportion of lightness to heaviness in equipoise. In fact it is in this way too, they say, that the universe itself has entirely escaped local motion, because it has been constructed out of the things that naturally move upwards and those that naturally move downwards. ⁴ This was also the conception of Xenocrates who, taking his start from Plato, seems ⁵ to have reached it by a kind of superhuman reasoning. Plato is the one who declared that each of the stars as well was constructed of earth and fire bound together in a proportion by means of the [two] intermediate natures, for nothing, as he said, attains perceptibility that does not contain an admixture of earth and light ⁶ ; but Xenocrates says that the stars and the sun are composed of fire and the first density, the moon of the second density and air that is proper to her, and the earth of water [and air] and the third kind of density and that in general neither density all by itself nor subtility is receptive of soul. ⁷ So much for the moon’s substance. As to her breadth or magnitude, it is not what the geometers say but many times greater. She measures off the earth’s shadow with few of her own magnitudes not because it is small but she more ardently hastens her motion in order that she may quickly pass through the gloomy place bearing away [the souls] of the good which cry out and urge her on because when they are in the shadow they no longer catch the sound of the harmony of heaven. ⁸ At the same time too with wails [and] cries the souls of the chastised then approach through the shadow from below. That is why most people have the custom of beating brasses during eclipses and of raising a din and clatter against the souls, ⁹ which are frightened off also by the socalled face when they get near it, for it has a grim and horrible aspect. ¹⁰ It is no such thing, however; but just as our earth contains gulfs that are deep and extensive, ¹¹ one here pouring in towards us through the Pillars of Heracles and outside the Caspian and the Red Sea with its gulfs, ¹² so those features are depths and hollows of the moon. The largest of them is called ¹³ Hecate’s Recess, ¹⁴ where the souls suffer and exact penalties for whatever they have endured or committed after having already become Spirits ¹⁵ ; and the two long ones are called the Gates, ¹⁶ for through them pass the souls now to the side of the moon that faces heaven and now back to the side that faces earth. ¹⁷ The side of the moon towards heaven is named Elysian plain, ¹⁸ the hither side House of counter-terrestrial Phersephone. ¹⁹

[29] Now they first see the moon’s greatness, beauty, and nature, which is not simple nor unmixed, but a composition as it were of earth and star. For as the earth mixed with wind and moisture becomes soft, and as the blood tempered with the flesh gives it sense; so they say that the moon, being mingled with an ethereal quintessence even to the very bottom, is animated, becomes fruitful, and generative, and is equally counterpoised with ponderosity and lightness. For even the world itself, being composed of some things naturally moving upwards and others by nature tending downwards, is exempt from all local motion or change of place. These things also Xenocrates seems by a certain divine reasoning to have understood, having taken his first light from Plato. For Plato it was who first affirmed that every star is compounded of fire and earth, by the means of certain intermediate natures given in proportion; forasmuch as nothing can be an object of human sense which has not in some proportion a mixture of earth and light. Now Xenocrates says that the stars and the sun are composed of fire and the first or primitive solid; the moon of the second solid and its own peculiar air; and the earth, of water, fire, and the third solid. For neither is the solid alone by itself, nor the rare alone by itself, capable or susceptible of a soul. And let thus much suffice for the substance of the moon.

Now as to her breadth and magnitude, it is not such as the geometricians deliver, but manifoldly greater. And she seldom measures the shadow of the earth by her greatness, not because she is small, but because she adds to her motion by heat, that she may quickly pass the shady place, carrying with her the souls of the blessed, which make haste and cry. For when they are in the shadow, they can no longer hear the harmony of the heavenly bodies. And withal, the souls of the damned are from below presented to them, lamenting and wailing through this shadow. Wherefore also in eclipses, many are wont to ring vessels of brass, and to make a noise and clattering to be heard by these souls. Moreover, that which is called the face of the moon affrights them when they draw near it, seeming to them a dreadful and terrible sight; whereas indeed it is not so. But as our earth has deep and great bays, one here running between Hercules’s pillars into the land to us, and others without, as the Caspian, and those about the Red Sea; so in the moon also there are hollows and great depths. Now of these, the greatest they call the gulf of Hecate, where the souls punish or are punished according to the evils they suffered or did whilst they were Daemons. The two others are long passages, through which the soul must go sometimes to that part of the moon which is towards heaven, and sometimes to that which is towards earth. Now that part of the moon which is towards heaven is called the Elysian fields; and that which is towards the earth, the fields of Proserpine that is opposite to the earth.