Here goes, I'm currently sleepless because I got started thinking about dimensions, and why we only percieve 3 spatial ones.
it started simple, make a point and another point and draw a line between them, now you have one dimention, pretty simple so far.
do note that if you were to make two other points and draw a line that is not parralell to my original line it would still be one dimension, just a different one, it all depends on you defining the line as the baseline dimension, it matters later on.
so now you have one dimension, lets make another one, you'd most often think to draw a new line in a 90 degree angle from the first, but that just makes further explaining more tedious, so we'll do it the proper way instead.
instead of thinking about the first line as point A to point B, think of it as a continous series of points going from point A to and beyond point B, and equally from B to and beyond A.
what we do next is make a new "line" parralel to the first, and again, and again, etc.
Now we have two dimensions of points lined up, like a paper covered in dots, so far so good.
we now have a simple recipe for the third dimension, a paper with dots on top of the first paper, and so on.
Now I want to return to the line at 90 degrees model, just because that's how I had it in my head at the time.
Imagine this model, three lines all at 90 degrees from one another, and put it in a box, now make an identical box and place it next to the first box, make another one and another one and so on and we got outselves the fourth dimension.
WELCOME
You made it this far, well done, that was the intro.
in school we used x,y,z to determine coordinates on a 3d model, but because I'll be talking about a 4d model I'll use A,B,C,D instead.
remember the two one dimensional lines I mentioned at the start, the point I wished to make was that there is no "first" direction unless we define one, any three of the 4 dimensions we made so far can be the spacial ones we can percieve, and that is why I can't sleep right now.
So now lets make an experiment, take point A2,B3,C4 on a 3d model, simple, trace A to 2, then B to 3, then C to 4, there you go.
Or trace B to 3 first, then A to 2 and C to 4, or any other combination for that matter, it all ends in the same location.
Now look for A1,B2,C3,D4 on a 4d model, can we, like in the 3d model, trace from any dimension first?
in my sleepy brain, no, I have to start with D, look for cube number 4, and then proceed with the 3d model inside.
If you are not yet tired of pondering about the above text, feel free to do so for a while, I'll bold the next step so you'll find it easily
Lets take it a step further, and add another dimension, we left off with a line of cubes with a 3d model inside, and because I taught us the proper method before, we can easily add another dimension by making a new line above the first, again and again, we now have 5d, lets make more, lines of cubes on top of those cubes, now we got a big rubics cube, that's also 6 dimensions.
But wait, it looks kinda similar to the dots of the first three dimensions, in fact, lets just shrink all the cubes into points and make the new 6d model look exacly like the 3d model and call the last 3 dimensions the ones we can see everyday.
I have no Idea what I can accomplish with this as of this moment but it's a funny thought.
and since we have a 6d model disguised as a 3d model, let's put it in a cube and copy it, a line of 6d cubes becomes 7d, now we continue the same steps as before and add lines, then lines of lines to have 9 dimensions, neat.
Here comes the biggie, suppose the 9d model A,B,C,D,E,F,G,H,I and define dimensions A,D and G as the spatial dimensions we see in the everyday life.....
Now I'm going to bed