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.”
― Brian P. Copenhaver, Hermetica: The Greek Corpus Hermeticum and the Latin Asclepius

“If you are mindful, Asclepius, these things should seem true to you, but they will be beyond belief if you have no knowledge. To understand is to believe, and not to believe is not to understand. Reasoned discourse does get to the truth, but mind is powerful, and, when it has been guided by reason up to a point, it has the means to get the truth. After mind had considered all this carefully and had discovered that all of it is in harmony with the discoveries of reason, it came to believe, and in this beautiful belief it found rest. By an act of god, then, those who have understood find what I have been saying believable, but those who have not understood do not find it believable. Let this much be told about understanding and sensation.”
― Brian P. Copenhaver, Hermetica: The Greek Corpus Hermeticum and the Latin Asclepius