A father and son were traveling by train. Boy was 24years old. The boy was really excited and was looking out of window. Suddenly he shouted, "Dad look trees are going behind.."His dad smiled. There was a young couple sitting near by them. When they saw the childish behavior of boy they felt weird with pity for boy. Suddenly boy again exclaimed, "Dad look outside, clouds are running with us."Now seeing this again the couple couldn't resist and said to old man, "Why don't you take your son to doctor?"Old man understood and just smiled and said, "I did, we are just coming back from hospital. my son was blind from birth and there at hospital he had operation. he just got his eyes and now we are going back to home." 
Don't judge people before truly knowing them because everyone has a story and sometimes truth might surprise you. 