The cardiologist, a bit surprised, walked over to where the engineer was working on the motorcycle.
The engineer straightened up, wiped his hands on a rag and said, “So Doc, look at this engine. I opened its heart, took the valves out, repaired or replaced anything damaged, and then put everything back in, and when I finished, it worked just like new. So how is it that I make $30,000 a year and you make $2 million, when you and I are doing basically the same work?”
The cardiologist smiled and replied: “Try doing it with the engine running.”