4th dimension, would it be possible to see it?

an out of body experience (yes we do have souls) is the only way to see the 4d and other higher dimensions.

the human mind has the capacity to access the four-dimension,it is have the capacity of observe the simultaneous and non-simultaneos events,and local and non-local effects.

Go on then. I dare you.

The way I envision it is just as seeing everything transparently since you could the inside and outside of everything all at once. I know that you would actually see all angles of everything all at once transparently and opaque at the same time, but that is the simplest way for me think about it.

There are three physical dimensions. More eyes, as in an insect's compound eyes would just give a different view on those three dimensions.

Out of body experiences have been reproduced at will by a machine which makes the brain lose the location of the body. After death experiences have been reproduced by oxygen starvation.


The soul is based on the idea that we left our body when we dreamed. Despite untold billions having died, neither the church nor science has found the slightest evidence for it. Science says that a non physical thing cannot hang onto a physical body. we also know that if we change the brain in any way, it changes "us".


Since we have no evidence for souls, how can you know they allow us to see the 4d?

Think of three dimensions as three crossing axes. Each axis is perpendicular to the other two. Draw that on a piece of paper, and you have a cube in perspective --- a cube shown in 2 dimensions.

Now, think about those three axes, and try to imagine a 4th axis that would be perpendicular to all three. That would be the 4th dimension. That is what the rotating tesseract picture that was posted was trying to represent (lookup tesseract on wikipedia). The 4th line coming out of each corner is supposed to represent the 4th direction --- in perspective. Only now, it is 4 dimensions represented in 2. So, you can't get the real feel, just like you can't get the real feel even for a cube in 2 dimensions.

Think of time as a way to move perpendicular to all 3 dimensions of space (not accurate, but a fun thought exercise)

I was surprised to learn recently that the existance of a full sized 4th spacial dimension was disproven back in the 1700's.

An easier way of imagining extra dimensions is to start with a 3D cube say 6" x 6" (using inches " and feet ' ). You then have a piece of wood about 5' x 1' x 1' . Mentally insert the cube inside the wood at an odd angle half way along. That plank of wood represents the fourth dimension. Now extend the plank so it is 5' x 5' by 1' . That is now the fourth and fifth dimension with the 3D cube still embedded in it. Now extend that square of wood to 5' x 5' x 5' . Now you have six dimensions. Go back to the beginning and repeat this process for more dimensions.


Since EMR is a 3D wave, it will not show us any more dimensions, no matter how many eyes we have.

This delusionary 'plank' is thicker than a piece of 2" by 4".

Rabbit. Another really intelligent post. Don't you have a nursery to attend?

I found kaneda's description pretty hard to handle, too. It must be a fault in my perception of the description, so if you will, sir, try that again? My mentally inserted cube got really stretched when I extended the chunk of tree trunk by 4'.

I couldn't pull off the plank stretching exercise either. Got splinters in my brain.

H.G. Wells in “The Time Machine” stated that length, width, and depth represented the first three dimensions. In order for an object to exist it must have the previous three dimensions as well the fourth, which is duration (time).

Of course, the “The Time Machine” is not a textbook.

Sapo. The 3D cube does not need to expand. It is a mere reference point for the higher dimensions.

Its easier to work with triangles and tetrahedrons.

Imagine an Equilateral triangle in two dimensions.

Now add one vertex to make an regular tetrahedon in 3d. You can make this shape with some straws and hot glue. It has 4 vertexes, 4 faces, and 6 edges.

Now, add a fifth vertex that is not coplanar with any two of the other vertices. Every vertex should be the meeting place of 4 edges. The 4th dimensional hyper tetrahedron has 5 "cells" which are tetrahedrons, 10 faces, 10 edges, and 5 vertices.

There are two ways to project this fourth dimensional object into three dimensions, neither tells the whole story. In the real hyper-tetrahedron in 4 dimensions, all cells are identical, all faces are identical, all edges are identical, and all vertices are identical. But in the three dimensional projection you must "stretch" it some.

First way:
Take your regular 3d Tetrahedron and set it flat on a table. Now add an edge protruding from the top vertex vertically, this edge should be the same length as the original 6 edges. Now create three more edge pieces connecting the end of the new vertical edge to each of the other three vertices from the orginal tetrahedron. In this projection, the 5th vertex (representing the fourth dimension) is "contained" by the other 4 vertices. Only one tetrahedron remains correctly proportioned, while the other 4 are highly distorted.

Second Way:
Take your regular 3d Tetrahedron and label one face "middle" and label the opposite vertex from that face "top". Now cut 3 pieces of straw the same length as an edge of the tetrahedron. Connect each of these pieces to the 3 vertices on the "middle" face of the first tetrahedron, so that they form a 5th vertex opposite "top". This vertex is now labelled "bottom" and you have two tetrahedrons which share a face and are oriented opposite each other. Now create one more "edge" connecting vertex "top" to vertex "bottom". This model produces two properly proportioned tetrahedra, but 3 are still highly distorted.

Neither of these models are perfect, they are "projections". Additionally, neither of these is a model of a tetrahedron in "time", they are models of a hypertetrahedron, which is quite different.