Don't draw conclusions until you know all the facts

An old man was sitting with his 25 years old son in the train. Train is about to leave the station. The young man was filled with a lot of joy and curiosity. He was sitting on the window side.
He took out one hand and felt the passing air. He shouted, "Papa see all trees are going behind". Old man smile and admired his son's feelings.
Beside the young man was a couple that were sitting and listening to the whole conversion between father and son.
They felt a little awkward with the attitude of the 25 years old man behaving like a small child.
Suddenly the young man again shouted, "Papa see the pond and animals. Clouds are moving with train".
The couple watching the young man were now embarrassed. It started raining and some of the water drops touched the young man's hand.
He was filled with joy and he closed his eyes. He shouted again," Papa it's raining, water is touching me, see papa".
The couple couldn't help themselves and asked the old man. "Why don't you visit the Doctor and get treated your son?"
The old man said," We are coming from the hospital. My son got his eyes for first time in his life".
Moral: "Don't draw conclusions until you know all the facts"