It's about somebody initially knowing more about it than you do but eventually you learn a lot about it yourself and practise the skills and techniques that you've been taught.
“I made a written report which is still today in existence. I have a photocopy of it, and I am saying that in production this aircraft could perhaps substitute for three propeller- driven aircraft of the best existing type. This was my impression.”
“In Dreams... well, I was slightly overcompensating with that. I was a bit like a director for hire, so maybe I was putting too much imagery that was familiar to me into it.”