Wherefore, existence in a state of four dimensions, or the world of N4, as I have always called it, is, roughly speaking, one.

Time and space are, as it were, two sides of the same shield, and a person living in that world can see both of them at once.

Wherefore, past, present, future, length, breadth, thickness, here and there are all the same thing to him.

It's a great pity there isn't a fourth dimensional language as well, so that one could state these things a little more precisely.

But that, of course, is out of the question.
"Really, I can hardly make myself understand it as far as words and phrases are concerned; still, there it is; and now the question arises: Having got this power, as I certainly have, of transferring myself from one existence to another by a mere effort of thought, because it is very evident that this power is really only an extension or an exaltation--confound the language of the third dimension--I can't say it! Although I understand what it is, it won't go into words.