alas, what we seem to lack thus far is a Genius of Mensuration ;^>
One of Feynman's lovable quirks was his ability to communicate with us ordinary plebs - all of his 'popular' books were.. well, Popular.. and about as far from quantum chromodynamics as the sex life of a Chess Master / a Feynman diagram?
In reading his stuff, I think his ordinary-speech hints are as good as any we get from the likes of other time-tested Genii (Einstein's hints were so often of adage grade - not the lingua franca of plebs.)
One phrase he was fond of was, "the pleasure of finding things out".
I know this pleasure. It [alone!] accounts for any single topic about which I ever eventually felt some level of 'understanding' == "standing under". His oft-related story about the ball in his wagon + his father's inspired 'answer' to the Why? - surely gives the major clue to his subsequent activities.
He Liked to Find Things Out\ufffd!
I submit that (as with Ramanujan et alia) THIS == that there exists a 'thing' One Chooses to put one's fullest Attention --> On!
-- is the closest we are apt to get to the necessary ingredient for a budding-genius ever to er, flower.
Yes, all the business about training applies to that fanciful learning curve (though no 'motivational speaker' need apply; it's Built-In) -- but while that may affect the slope somewhat, the Desire must be present and constant. Perhaps genius is about sustained focus - said one blind man measuring the elephant.
Nobody knows how to inculcate Desire (except small-d, for tawdry things you can buy and amass / or someone Else's 'religion', if a one is unimaginitive) - certainly there is seen to be no transference of, what a committee determines to be Right-Desire: that sort of quest is ~ what people seek gurus, about. To find out if... they Desire 'Truth' enough to work really hard to approach it [??]
If the Principle, The lower cannot see the Higher applies - IMO we aren't going to discover how to incubate a genius ... however much logical analysis we plunge the subject into. Still, we do learn from these essays something about 'mensuration' and about, how few significant figures there are, at the end of such calculations -- once corrected for metaphorical-error e666 tan \ufffd
Ah yesss - the IQ Test - why.. mine reached into Three Figures.