A gaint ship engine failed.The ship owner's tried one expert after another but none of them could figure what could be the problem and how to fix the engine.Then they brought in an old man who had been fixing ships since he was young.He carried a large bag of tools with him and when he arrived,he immediately went to work.He inspected the engine very carefully, from 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 ship 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 $2million.
"What??" the owners exclaimed "He hardly did anything!"
So they wrote the old man a note saying "please send us your itemized bill"
The man sent a bill that read:
Tapping with a hammer ........... .... ..$200
Knowing where to tap........ ..... ....$1,999,800

Effort is important,but knowing where to make an effort makes all the difference! Keep studying hard.Don't give up.