This ability to see -- an ability honed by the product of relentless determination combined with a mind possessed with an almost singular desire to seek and see true -- is a master key found among many of the most penetrating insights. Feynman said it this way:
You have to keep a dozen of your favorite problems
constantly present in your mind, although by and large
they will lay in a dormant state. Every time you hear
or read a new trick or a new result, test it against
each of your twelve problems to see whether it helps.
Every once in a while there will be a hit, and people
will say, “How did he do it? He must be a genius!" [1]