Thans for the viideo already watched ti, want the next step - not one showing the math is simple and then gonig blah blah - if I find that "simple" video I all post it. I can map a teersect in the 3rd deminsion, or use 4 axis with the 4th beng time geomertry wise, as a visual learner thats pretty easy which I sho wer e
Take a photo. Pretend the photo is 3d. SO you have the up and down left and right (2d) and an imagine line showing depth - whic is easy to imagine since you as person knows here depth, that is someone behind a photo, you know is behind, even if on the photo its flat, and everyone is actually (in the photo not what it represent) the same distance from your eye. Yet we can magically see in our minds eye the 3rd dimension.
If anyone interested I post the next step to see the 4th dimension in your minds eye. But the Ricci equqation is currently giving me trouble visualization it but ya, Sagans video is a great first step. It allowed me to see imaginary tesseracts. but the above shows is pretty eeay to create an imaginary dimension that you actually dont evne notice is imaginary - if asked about a photo people are confident aobut sepakng of the 3 dimension as if it was in the photo (which allows some photograpy tricks to come into play, photography can be both science and art.)