Phaedo (109-110)

Phaedo. I am convinced, then, said he, that in the first place, if the earth is round and in the middle of the heavens, it needs neither the air nor any other similar force to keep it from falling, but its own equipoise and the homogeneous nature of the heavens on all sides suffice to hold it in place; for a body which is in equipoise and is placed in the center of something which is homogeneous cannot change its inclination in any direction, but will remain always in the same position. This, then, is the first thing of which I am convinced. And rightly, said Simmias. Secondly, said he, I believe that the earth is very large and that we who dwell between the pillars of Hercules and the river Phasis live in a small part of it about the sea, like ants or frogs about a pond, and that many other people live in many other such regions. For I believe there are in all directions on the earth many hollows of very various forms and sizes, into which the water and mist and air have run together; but the earth itself is pure and is situated in the pure heaven in which the stars are, the heaven which those who discourse about such matters call the ether; the water, mist and air are the sediment of this and flow together into the hollows of the earth. Now we do not perceive that we live in the hollows, but think we live on the upper surface of the earth, just as if someone who lives in the depth of the ocean should think he lived on the surface of the sea, and, seeing the sun and the stars through the water, should think the sea was the sky, and should, by reason of sluggishness or feebleness, never have reached the surface of the sea, and should never have seen, by rising and lifting his head out of the sea into our upper world, and should never have heard from anyone who had seen, how much purer and fairer it is than the world he lived in. I believe this is just the case with us; for we dwell in a hollow of the earth and think we dwell on its upper surface; and the air we call the heaven, and think that is the heaven in which the stars move. But the fact is the same, that by reason of feebleness and sluggishness, we are unable to attain to the upper surface of the air; for if anyone should come to the top of the air or should get wings and fly up, he could lift his head above it and see, as fishes lift their heads out of the water and see the things in our world, so he would see things in that upper world; and, if his nature were strong enough to bear the sight, he would recognize that that is the real heaven and the real light and the real earth.

Phaedo. For this earth of ours, and the stones and the whole region where we live, are injured and corroded, as in the sea things are injured by the brine, and nothing of any account grows in the sea, and there is, one might say, nothing perfect there, but caverns and sand and endless mud and mire, where there is earth also, and there is nothing at all worthy to be compared with the beautiful things of our world. But the things in that world above would be seen to be even more superior to those in this world of ours. If I may tell a story, Simmias, about the things on the earth that is below the heaven, and what they are like, it is well worth hearing. By all means, Socrates, said Simmias; we should be glad to hear this story. Well then, my friend, said he, to begin with, the earth when seen from above is said to look like those balls that are covered with twelve pieces of leather; it is divided into patches of various colors, of which the colors which we see here may be regarded as samples, such as painters use. But there the whole earth is of such colors, and they are much brighter and purer than ours; for one part is purple of wonderful beauty, and one is golden, and one is white, whiter than chalk or snow, and the earth is made up of the other colors likewise, and they are more in number and more beautiful than those which we see here. For those very hollows of the earth which are full of water and air, present an appearance of color as they glisten amid the variety of the other colors, so that the whole produces one continuous effect of variety. And in this fair earth the things that grow, the trees, and flowers and fruits, are correspondingly beautiful; and so too the mountains and the stones are smoother, and more transparent and more lovely in color than ours. In fact, our highly prized stones, sards and jaspers, and emeralds, and other gems, are fragments of those there, but there everything is like these or still more beautiful. And the reason of this is that there the stones are pure, and not corroded or defiled, as ours are, with filth and brine by the vapors and liquids which flow together here and which cause ugliness and disease in earth and stones and animals and plants.