Earlier quoted context omitted.
I'm not the cleverest guy in this room. I once took an online IQ test and only got 115. To be fair, lots of questions were things like "What of this has no relationship with Kansas". But I digress... If a person trying to communicate cannot make his point understood by any but the most intelligent, then he has failed in communicating.
It depends on the point and the audience. If the point is complex enough, then you have to give up on conveying it to certain people. If the audience is smart enough, you reach past the lowest common denominator. Indeed, the best way to write something that lasts for ages is to write something that ordinary people reject, bright people don't really understand, and the smart fall head over heels in love with. That's w…
That Feynman could explain fairly abstract physical concepts such that laypeople could understand them may imply that one needs to understand the 'complex point' better before trying to explain it.