the beginning - continues

This is another true story. Again, my "writers block" has not yet cleared. so i am writing what i have heard from someone else.

An old man was traveling with his 25 year old son in a train

As train started moving, the young man was filled with a lot of joy and curiosity at the sights outside the train.
He was sitting next to the window.
He put his hand outside the window and felt the passing air. He shouted, "Papa see all trees are going behind".
Old man smiled admiringly at his son's feelings.
Beside the young man a couple was sitting and listening to the conversation between father and son.
They were a little awkward with the attitude of the 25 year old man behaving like a small child.
Suddenly the young man shouted again, "Papa see the pond and animals. See how the clouds are moving along with the train".
The couple watching the young man was getting more and more uncomfortable at the young mans behavior, but it had no effect on either the father or the son.
Suddenly, it started raining and rain drops fall on the young man's hand.
the young man is overjoyed and he shouts again, "Papa, see it's raining, see the raindrops on my hands papa".
the couple couldn't help themselves and ask the old man.
"it seems that your son is not well. Why don't you have your son treated?"
The father said,
" Yes, We are coming from the hospital. My son was born blind. due to the new technologies and breakthroughs, it is just today that my son got his eye sight. He is excited as he is seeing things for the first time in his life".

isn't it true that we come to conclusions without having any knowledge about things? that is human nature, isn't it?