The subject possible to explain from a mathematical standpoint, but is impossible to directly correlate it to anything tangible in this 3-dimensional world of ours. I would recommend trying to read these writings and writings of similar topics with a blank mind and try not to connect the ideas of 3d thought into something that directly defies it. That is what made me not understand the topic when I first started to dabble in it about a year ago. This can be thought about as both mathematically sound and abstract in the limits of our understanding. It’s one of the most confusing topics but also one of the most rewarding to understand!