The Significance
Since we have established a proper 5th dimensional space as well as implications of its transcendent nature to back it up without any single glimpse of being part of other space-times or realms. Now, I would like to discuss why it should rightfully be significant.
In this particular scan, we are met with two worlds. These are called Light and Darkness or in better terms, Human and Demon World. There are two details to note here:
- The Darkness (Demon World) was bluntly stated to be endless in its entirety, not that it expands endlessly. There is a difference between both ideas unless we start declaring infinite universe statement as finite from now on. The raws also says it's infinite Darkness.
- The description particularly treats Human World as a line which is essentially the same as saying it's a "slice" as per FAQ mentioned above and thus, qualify it for a lower dimensional object in comparison as lines are fundamental for defining higher dimensions in geometry and mathematics.
With this in mind, I believe it is more than enough evidence to go on with. I have no reason to expand over it from here; that's literally as simple as you can go for this. Unless, we start applying semantics to it.