I once heard on NPR an interview with a woman who had worked professionally as both a brain surgeon and a rocket scientist. She confirmed that brain surgery was indeed the more difficult of the two.
Starting that second try at a problem that drove you to full-bore gold-braided hair-tearing despair the first time.
If insanity can be defined as doing the same thing and expecting a different result, civilization must depend deeply and broadly on great minds that are slightly cracked.
Amen to that! 
Getting toddlers to share.
There’s headline for everything on The Onion:
Suborbital Ballistic-Propulsion Engineer Not Exactly A Rocket Scientist
Shit, that’s me! Well, except for the yellow t-shirt; I would never wear a piece of attire that makes me look like an egg yoke.
Stranger
Passing a camel through the eye of a needle
Hell, just passing a camel is hard enough.
Trivial. Get a very large needle, and a really large meat grinder; problem solved ! It is hard on the camel, I’ll admit.
I submit that the ongoing study of ecological relationships and fitting them together into a meaningful whole is pretty tough.
Guess what I do. 