Take a line, any line,
and the linear point from A to B
is the first dimension.
Imagine this line is pliable,
elastic. It can be altered,
it can be more than it is.
Pull this line towards you,
you now have a width, a square,
and the second dimension.
Take the square,
draw a line from each corner,
it then reshapes into
a three dimensional cube.
We live in three dimensions,
don’t we, isn’t that all there is?
So, you may be asking,
“Oh Captain, my captain,
what or where
is the fourth dimension?”
Well, imagine the cube,
and in your mind’s eye
draw lines outwards, one from each
of the cube’s eight edges.
You now have a cube in the center,
yet a new dimension outside it.
This is called a hypercube, a tesseract.
That’s the fourth dimension,
or akin to on top of a school table
where the classroom never looks
the perspective it once was
after you’ve made the jump,
like a certain scene from a film
about a Dead Poets Society;
literally, thinking outside the box.
Many visitors to Paris don’t realise it, but this structure represents the fourth
dimension, being as close to visualizing a 4d cube in 3 dimensions.