And I repeat.,"WHAT?"

"A complex space built out of complicated congruences of null lines". And I repeat,"WHAT?" Once again I understand each of the words by themselves but can make no sense out of the sentence after the first read. It's getting so I have to read each sentence two of three times then think about what it means. which slows me down considerably. I begin to wonder if this is getting too far above me to fully understand. And I'm not even looking at the mathematics involved. So I keep plodding on wondering where it is all going. I know each paragraph says something but I know not what (the first time). Pictures I understand and can work with. But even a simple function such as symmetry still eludes me at the far reaches of its domain. Too much of this didn't exist when I went to school, I can get past the concept of strings, that's intuitive. But spinors and twistors were not part of any curriculum I studied.
Still I try to understand these non-intuitive ideas because ... Use it or lose it. If I read something enough times should get it sooner or later. Or will I? I am learning about complex numbers in which it is necessary to take the square root of a negative number. I learned this is not possible.
but it turns out that it is possible to work with and fruitfully use with these enigmatic numbers. So I'm learning something although it is not going where I started out heading.
Complex numbers are hidden proof that we're all on this flight together.

Dick