Where to make an effort

Ever heard the story of the giant ship engine that failed?
The ship's owners tried one expert after another, but none of
them could figure but how to fix the engine. Then they brought
in an old man who had been fixing ships since he was a
youngster. He carried a large bag of tools with him, and when
he arrived, he immediately went to work. He inspected the
engine very carefully, top to bottom. Two of the ship's owners
were there, watching this man, hoping he would know what to
do. After looking things over, the old man reached into his bag
and pulled out a small hammer. He gently tapped something.
Instantly, the engine lurched into life. He carefully put his
hammer away. The engine was fixed! A week later, the owners
received a bill from the old man for ten thousand dollars.
"What?!" the owners exclaimed. "He hardly did anything!"
So they wrote the old man a note saying, "Please send us an
itemized bill."
The man sent a bill that read:
Tapping with a hammer ...................... $ 2.00
Knowing where to tap ............................ $ 9998.00
Effort is important, but knowing where to make an effort in
your life makes all the difference.
Efforts without direction are worthless.