“… as simple as riding a bike. – Only you’re riding that bike on a springboard over the Grand Canyon while juggling six balls with a random seventh, eighth or ninth thrown in, doing your federal tax returns, taking dictation from an auctioneer, speaking a foreign language, interpreting several hieroglyphic maps, operating at least four computers, drinking a bottle of water, doing algebra in your head, and simultaneously conducting urgent experiments in navigation, critical thinking, meteorology, biology, psychology, chemical propulsion, thermodynamics, metallurgy and – of course–aerodynamics as you prepare to react to a dozen different emergency situations that could have life-threatening implications if you don’t do the right thing nearly immediately.”

From this awesome blog: http://airfactsjournal.com/2014/01/hard-fly-airplane-simple/