I interviewed a Caltech grad for a job once. She was completely qualified (overqualified?) and I figured that out in all of about 3 minutes. So I asked her if s

I interviewed a Caltech grad for a job once. She was completely qualified (overqualified?) and I figured that out in all of about 3 minutes. So I asked her if she'd taken Feynman. She smiled and said she'd sat in on a seminar where he lectured and, similar to your Feynman effect, she said that he had the ability to take the most complicated idea, crystalize it, explain it and that you would understand it. This effect lasted for about 5 minutes after which you would confuse yourself. BTW, she didn't get the job which was not my doing. My boss was a woman who felt threatened by having another woman who was massively smarter than she was. As for Feynman, I'm more than ok with his lectures. Clarity is no substitute for application but it damn well helps application.