That made me think of why we can't perceive the physical aspect of 4D which is said to be equally physical and non-physical. After all, 2D critters can perceive and interact with our 3D material world, so why can't be interact with the 4D physical reality in the same way? One possibility is that we already do interact with the 4D material world, and it's actually the same as the 3D material world, but the missing component that would expand it to its full manifestation is the non-physical part. It could be similar to the way 2D animals are able to perceive and interact with SOME of our 3D reality, but not ALL.
What is missing for animals is their level of consciousness or awareness of the full manifestation of our 3D world. A doggie that was fully aware of 3D would be a doggie that could drive a car, shop for and cook his own dinner and do calculus, (not just run around the garden, bark at stuff and eat food - and give and get lovies of course!) He'd still be in the same world, but that world would be massively expanded in terms of his ability to interact with and manipulate it. Similarly, a human that was fully aware of 4D would still be in the 3D material world, but likewise, his/her ability to interact with and manipulate it would be expanded by a similar order of magnitude to a mathematician doggie who likes to cook and host fabulous dinner soirees that are the talk of the neighborhood.
I seem to remember intimations from sessions that the 'transition to 4D' will not be some kind of transportation to a radically new reality, but rather the expansion of this one in such a way that, from a practical point of view, it becomes very different indeed.
I really liked the analogy that
@Neil (I think) brought up somewhere: imagine a squirrel in a forest, witnessing how once in a while, a bunch of workers shows up and cuts down parts of his surrounding, radically changing it. Now imagine our squirrel has esoteric ambitions and wants to find out what's going on and then influence all of that so for its own purposes.
Now, the squirrel might have some dim awareness of some patterns, like the typical time of the year the workers show up. But to predict what kind of trees they will cut, and where, they would need to understand the globalized timber business! Like: okay, prices for gas went up, so people are buying more firewood, so the prices go up for that as well, which means the forestry will cut more oak trees, because this makes good firewood and so on. Or: there's a new fashion for furniture made of birch tree, so the price went up for that, so the forestry increases its cutting of birch trees... Also, the squirrel needed to realize that the forest is really a plantation, and as such is designed!
So if our squirrel wanted to interact with this reality and influence it, it could hire a PR agency and put a bunch of hit-pieces in
Marie Claire Maison about how fashionable furniture made of spruce are - so that prices go up for that, so that the squirrels' children might have more of their beloved birch trees... Or it could start speculating on the gas markets to influence demand of fire wood...
Silly, I know, but this might give us an indication about how vast the gulf between the densities really is. And it all depends on
awareness. And intelligence of course. So some DNA changes in the squirrel would be needed to give it the brainpower. But these changes wouldn't magically "beam" it into a new reality; it would "just"
open its eyes.