If you want to know how much of a genius Albert Einstein was, check out his book on special relativity. It’s available in surprisingly many libraries. My high school library, for instance, had a copy.
On the first page and a half, Einstein lays out his understanding of how time works in about five paragraphs. No math, just plain English that a 12th-grader could read.
These are truly amazing paragraphs. You read one sentence. Then you stop to think about it, and your brain begins making connections. After 30 seconds or so, you’re ready to go on to the second sentence, and the same thing happens again, and again. No other technical author has ever done that to me to the same extent.
If you can read that first page-and-a-half and come away thinking, “Nah, that’s not so great,” you’re a smarter person than I am, or far more arrogant.