Gaia (i.e. Earth) is a multidimensional being.

“Dimension” here means two things:
a) vibrational density;

b) level of consciousness.

The relation between a) and b) is that of correspondence.

In her material form, Gaia has four layers of vibrational densities.
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Following are the nine levels of the flow, with respect to humanity:

The 9D is the first-level manifestation of Galactic Consciousness, the first movement of the galactic womb energy, the one-in-all and all-in-one state; the 9D doorkeepers are human intelligences in the galactic core—the central sun, Ra.

The 8D is the realm of primal division of dualities, featuring rudimentary structural forms of Galactic Consciousness; the 8D doorkeepers are human intelligences in the Orion constellation.

The 7D is the realm of sound and harmonics that can generate geometric patterns in 6D; the 7D doorkeepers are human intelligences in Andromeda, a twin galaxy to the Milky Way.

The 6D is the realm of numerical and geometric forms—the mathematical morphs (the Platonic ideas, so to speak); the 6D doorkeepers are human intelligences in the Sirius star system.

The 5D is the realm of beauty and love—the artistic morphs (the flesh-and-blood level of Platonic ideas, so to speak); the 5D doorkeepers are human intelligences in the Pleiades star cluster.

The 4D is the realm of concepts, symbols, and archetypes, angels, demons, and spirits—an astral zone; its doorkeepers are astral lights, whom you call “angels.”

The 3D is the realm of dense matter, home of organic and inorganic things in space-time; its doorkeepers are Gaian humans.

The 2D is the realm of elemental spirits (i.e. earth, water, fire, air, and ether); its doorkeepers are the reptilian powers, whom you call “dragons.”

The 1D is the realm of Gaia’s inner sun, the source of planetary energy, the Root Chakra of all life forms; its doorkeeper is Gaia herself.