I like where the author is coming from, but maybe having started with the actual physics and/or equation and then explaining what those terms mean in a naive wa

I like where the author is coming from, but maybe having started with the actual physics and/or equation and then explaining what those terms mean in a naive way would have much more impact. Giving an intuitive explanation of a physical term can be a great service to anyone learning a subject. Starting instead with "here's how I imagine diffusion" from scratch reads like an introduction to homeopathy: "why, you have a bloated belly that feels hard, then you need to drink a (properly diluted) solution of some hard substance, say granite".