Quote:The Golden Compass" (book) starts off with comments about various worlds that are nearby but in the sky and hidden by a veil or the aurora. That sounds similiar to the various focus levels !
Actually, this would be an example of a parallel dimension, a probable earth, an alternate universe, however you want to call it. A place just as physical as the one we are in now, only a different set of probablities manifested in that reality. It could be that the author had an experience in which he became aware of a reality such as this one. This would most likely occur through the dream state, although it is possible to access these probable realities through other means, other states of consciousness, as well.
I dont agree with the statement that they are "in the sky". This version of earth would occupy the same space as our earth, although space doesnt even exist in higher levels. This earth would have a different vibratory level than ours, therefore being unperceivable unless you altered your own vibrations to match those of that parallel reality, which is possible to do in altered states of consciousness.