The importance of appreciating one's expertise

[Father Kit Cool Gun Garth]

 

A giant ship's engine broke down and no one could repair it, so they hired a Mechanical Engineer with over 30 years of experience.
He inspected the engine very carefully, from top to bottom. After seeing everything, the engineer unloaded his bag and pulled out a small hammer.
He knocked something gently, and soon, the engine came to life again. The engine has been fixed!

A week later the engineer mentioned to the ship owner that the total cost of repairing the giant ship was $20,000.

"What?!" said the owner. "You did almost nothing. Give us a detailed bill."

The answer is simple:
Tap with a hammer: $2
Know where to knock and how much to knock: $19,998

[twelve mile REB]

Very old story but true so very true.