The mechanic straightened up, wiped his hands on a rag and asked, "So Doc, look at this engine.
I open its' heart, take the valves out, repair any damage, and then put them back in, and when I finish, it works just like new.
So how come I make $40 k a year and you get the really big bucks when you and I are doing basically the same work?"
The cardiologist paused, smiled , leaned over, and said.........."Try doing it with the engine running."