Everybody has differing gifts. A car engine baffles me and I
  have no interest in it whatsoever. But our mechanic can listen
  to the car, know exactly what's wrong with it, and have it fixed
  up in less than an hour. That's genius, to be able to mentally
  visualize the workings of a car and use your ear to give you the
  information you need. Everybody has their genius - and you
  shouldn't judge someone by what they're incapable of doing - but
  rather what they excel at. I just wish everybody gets a chance
  to prove themselves at least once in their life.

  August 23, 2011 Kenneth Udut Google+

  [May 22, 2014 update: I've since learned everything about how an
  engine works.

  I am even more impressed at good auto technicians than ever
  before]