Quote by Brian P. Copenhaver

“This hollow of the world, round like a sphere, cannot itself, become of its quality or shape, be wholly visible. Choose any place high on the sphere from which to look down, and you cannot see bottom from there. Because of this, many believe it has the same quality as place. They believe it is visible after a fashion, but only through shapes of the forms whose images seem to be imprinted when one shows a picture of it. In itself, however, the real thing remains always invisible. Hence, the bottom - {if it is a part or a place} in the sphere - is called Haides in Greek because in Greek 'to see' is idein, and there is no-seeing the bottom of a sphere. And the forms are called 'ideas' because they are visible forms. The (regions) called Haides in Greek because they are deprived of visibility are called 'infernal' in Latin because they are at the bottom of the sphere. Such, then, are the original things, the primeval things, the sources or beginnings of all, as it were, for all are in them or from them or through them.”

Quote by Brian P. Copenhaver