We are living in a world with 3-dimensional space: width, height, and length. A point is zero dimension; a line is one dimension with length property; a rectangle is two dimensions with width and height properties; a cube is 3D with width, height, and length properties.

So, how is the fourth dimension? Normally, we will use time for fourth dimension. Why?

Now, if there is a point, with coordinate (x,y). Since it is a point, there is no length, width, or height, thus it is zero dimension. If the point is moving according to axis-y gradually with constant speed, and we record the point with time (t), then we plot the point into a graph, it will become a line as the right side of the image above. Therefore, zero dimension becomes one dimension.

Then, if there is a straight line, as the image above, and the straight line will move according to axis-y, and we record it with time (t), then we plot it again, we will produce a graph like the right side of the above image. Then, we can see that a line becomes a quadrilateral object which is 2D.

Next, if there is a 2D object, namely rectangle. We are using the same method as the above examples, record the position of the rectangle with time (t), then we try to plot it. As a result, we will produce something like the right side of the above image, which is something look like cube. From here, we can see that, the properties are width, height, and time. If we plot the time property into graph, it will just like the length property. That is why, the 2D becomes 3D by adding the time.

From all the examples above, we can find that, the time can be used as an additional dimension not only to the 3D world, but zero dimension, 1D, and 2D. Therefore, if we use a 3D object, and we record it, then we plot it into a graph, then we will produce a 4D object. However, since we are living in 3D world, we cannot understand how a 4D world look it, thus we cannot represent the 4D object visually.

However, if we really want to know how does it look like, we can try to use FFmpeg (software) to convert a movie into a sequence of image files. Then, we try to use an image browser to see the thumbnails of all the image files in one glance. Yes, this is how we can see everything in a glance despise the time.

Now, let us think about, how does the God, who is beyond the time and space, see each one of us?