Professor and the Boatman

A learned professor was traveling on a ferryboat. 
He decided to strike a conversation with the boatman:
"Have you ever studied astronomy?" asked the professor.
"I can't say that I have," answered the boatman.
"Then you have wasted a quarter of your life. By reading the constellations, 
a skilled captain can navigate a ship around the entire globe."
A few minutes later the professor asked, 
"Have you ever studied meteorology (weather forecasting)?"
"No, I have not." Answered the boatman.
"Well, then, you have wasted half of your life," the professor said. 
"Methodically capturing the wind can propel a sailing ship at astounding speeds."
After a little while the professor inquired again, 
"Have you ever studied oceanography?"
Boatman: "No sir. I have not."
Professor: "Ah! You have wasted almost three quarters of your life. 
You know awareness of the ocean’s currents helped many ancient peoples 
find food and shelter."
 “Sir! Can I ask you one question? The boatman said
"Have you ever studied ‘Swimology? 
“what is that? Never heard of it.” The professor said.
Boatman: “Swimology – the art of swimming” 
“No, I have never learned how to swim.” The professor replied.
“Well, My dear sir! In that case you have wasted your whole life. 
Because the boat is sinking and I am going to swim out of here. 
You are on your own now.” Saying this, the boatman jumped out of the boat. 

Moral: Never judge others with your own standards. 
             They might know somethings that you may not. 
                                               “Rajan Sachdeva”