'The act of discovery was not complete for him until he had taught it to someone else.'
I'd recommend Hillis' Web of Stories interview series [1] to anyone who appreciated this piece. He shares several of the stories described in the essay in video form (e.g. 105, 106, 119, 127 & 234), and there are plenty of other anecdotes and insights worth listening to.
I think Hillis is pretty interesting in his own right, but he's crossed paths with some other people in addition to Feynman that HN readers might be interested in hearing about: Marvin Minsky, Jeff Bezos, Freeman Dyson, Steve Jobs etc.
[1] https://www.youtube.com/playlist?list=PLVV0r6CmEsFzo005LM6PT...