Understanding hyperspace broadens our capacity for thinking and is a necessary component in our conscious evolution. Learning and practicing mathematics has always concerned increasing our capacity for problem solving, and understanding 4D+ space is no different. With it, we can imagine and create new things.
While there are spiritual implications for this, learning how to perceive four dimensions is a concrete feature of thought. We are rapidly moving towards a future of augmented reality and
transhumanism that will allow us to interact, perceive, and think directly in cyberspace, so it might be worth considering learning 4D mechanics since it will no doubt play a role in future developments.
The fourth dimension here specifically refers to a fourth
spacial dimension, a fourth direction. Yes, time is a dimension of space whose metric tensor has a negative eigenvalue, and it is often considered the fourth. Yes, it exists. Time is not the dimension that is ever mentioned here, so fasten your seatbelts and let's punch it to 60 in second gear.