I am new to this forum so I apologise if I am saying stuff that has been said a thousand times.
I have based my thinking about the fourth dimension on the patterns in the relationships between the first three dimensions (plus the zero dimension or point). By developing an understanding of the patterns between higher and lower dimensions, I have sort of come up with a general idea of what the fourth dimension would be like. Nothing new I think but I would like to talk about it anyways and see what others have come up with.
For example, every surface in four dimensional space would be three dimensional.
The third dimension is completely flat when seen from the fourth dimension.
Purely three dimensional substance would be insubstantial compared with four dimensional substance.
What do you think and what are some properties of the fourth dimension that you have come up with?
Tim