There seem to be many metaphors and many ways of looking at the concept of 3D and other constructs. Many of the videos from Alba Weinman, Dolores Cannon, Alison Coe, and other QHHT practitioners seem to be addressing the ongoing "split" between the "old 3D earth" and the "higher dimensional" "New Earth". Magenta Pixie's channelings of "The Nine" have been doing much of the same.
The best way I've come to understand or possibly explain it is this. As tiny pinpoints of awareness (aspects of "Divine Consciousness" or "God"), we float through an infinite number of universes and experiences. Some are physical. Some are not. This "3D" earth we're experiencing right now (in this moment of focused attention) is just one of countless others. The version of earth we're experiencing now probably won't even be the same one we'll experience tomorrow, next week, or even in a moment. This is because as our emotions and "spiritual energy" shift and change, this seamlessly moves our current awareness into adjacent or even overlapping realities that are more in alignment with those energies.
The most difficult thing to grasp is that, even though you and I might feel that we only exist in only one reality, we actually exist (in some form) in all the others as well. We also exist in many other planes of existence (non-physical too). This is what's meant by multi-dimensionality.
When we begin to "remember" or understand this--and the concept that we are sovereign beings, we begin to understand that we have "free will". This means that we can begin taking responsibility for
consciously creating (or manifesting) our own experience through our own focused intent. As we think, meditate, and begin speaking and acting in a positive manner, for example, we can more easily
align ourselves energetically with a timeline (or reality) that
resonates with that positive energy (or an outcome that is compatible with that vision).
Of course, the opposite is true as well. We can create the experience of greater separation or challenge through focus on negative energetics. Regardless of our focus, the stronger our belief in this ability, the faster we can create or manifest these changes.
In most cases (at least in this 3D experience), we've forgotten about these abilities and allowed others (government, parents, religions, etc.) to create much of our experience for us. Some (mostly those at higher levels of these control mechanisms) know ALL this--and they work very hard to keep us from rediscovering our own power.
If you're with me so far, that's awesome. This is hard to explain.
Now. Even though we may only be aware of this 3D physical earth we're experiencing at the moment, remember that this is just one of countless versions--and each version is surrounded by energetically different layers. This means that ALL the different dimensions are superimposed over the same reality. Some are tangible to our human form, some are not. In any given experience for example, one person may be operating at a "lower" 3D energetic level. He or she may only feel hurt or hatred from the experience. Someone who may be operating at a "higher" 5D level might feel love or compassion from the very same thing--whether it's a normal day-t0-day occurrence or an earthquake. This difference in energy will cause each person's consciousness to SHIFT to a nearby version of the reality that best supports that energetic. After more time has passed, these two people may be experiencing entirely different realities--and they don't realize it because each is interacting with another, slightly different version of the person they were interacting with before. This is actually one of the explanations of the "Mandela Effect" that really resonates with me.
Confusing? Yes. I'm just starting to grasp this stuff and I still get confused about it too. And of course, this is just MY understanding of how things may work. There are as many ways to see this as there are conscious beings to see them.
For me, the bottom line is this. Everyone is on their own journey through this experience of life. All paths are equally important--and all beings are too. Some may wish to explore the dark realms--and that's perfectly OK. I know what
I intend to create or experience and it in no way detracts from anyone else's experience...they are free to create their own reality on their own path. There are COUNTLESS, INFINITE, UNLIMITED realities out there and they are more than welcome to experience those if my chosen path doesn't resonate with them--there's no judgment.
In my chosen creation, there's a smooth, graceful transition to a New Earth--where humanity and nature will coexist in perfect harmony. I'm already seeing things shifting in that direction--and as more beings awaken and align to that reality, the faster it will come into manifestation!
And even if my understanding of things is completely incorrect, I'm perfectly OK with it. I still choose to see it as a wonderful adventure!