How do you envision fourth density?

[Aion]

Found this which answers whether or not they are different in nature.

66.30 Questioner: The planet has a certain set of conditions prior to transition into fourth density, that is in late third density, and then the conditions are different in early fourth density. Could you give me an example of a negatively polarized planet and the conditions [in] late third density and early fourth density so that I can see how they change?

Ra: I am Ra. The vibrations from third to fourth density change on a negatively oriented planet precisely as they do upon a positively oriented planet. With fourth-density negative comes many abilities and possibilities of which you are familiar. The fourth density is more dense and it is far more difficult to hide the true vibrations of the mind/body/spirit complex. This enables fourth-density negatives, as well as positives, the chance to form social memory complexes. It enables negatively oriented entities the opportunity for a different set of parameters with which to show their power over others and to be of service to the self. The conditions are the same as far as the vibrations are concerned.

I believe this also asserts my thought that they are referring to disharmony in regards to the transition to 4D negative, which is 'early 4D', imo.

66.29 Questioner: In a transition from third to fourth density we have two other possibilities other than the type that we are experiencing now. We have the possibility of a totally positively polarized harvest and the possibility of a totally negatively polarized harvest that I understand have occurred elsewhere in the universe many times. When there is a totally negatively polarized harvest, when a whole planet, that is, has negatively polarized and makes the transition from third to fourth density, does the planet have the experience of the distortion of disease that this planet now experiences prior to that transition?

Ra: I am Ra. You are perceptive. The negative harvest is one of intense disharmony and the planet will express this.