I found an interesting answer of Q'uo:
It's like if the seven planes was to incarnated entities.
Quote:It is not a question of location, my brother, for the dimensions are interpenetrating. However, you exist in denser and denser vibrations, according to your abilities. All of you exist into the fourth dimension, and there are adepts among you who are working at this time, actively, in the fifth dimension and are attempting to understand some of the teachings of the inner realms of the sixth dimension. There are a few people who work as far as the eighth, but there are two within this room who have seen it in visions and are aware of its nature, although they could not maintain it for any length of time. This is the octave of your universe, and these are the dimensions of that octave. To go beyond that, you must be free of your chemical body; and therefore we are talking to a roomful of those who are not going to be doing that any time terribly soon; however, there are many, many infinities to explore within those dimensions and much wisdom to learn. Therefore, we urge you onward; for the path becomes lighter, the teachings truer, and the laughter happier.
It's like if the seven planes was to incarnated entities.