In the train, two kids were making much noise by jumping on the seats and running here and there. Their father was sitting nearby quietly. When kids stopped to look at him, he would reply with a smile. At last, all the passengers got angry with them and their father.
Then one of the travelers came to the father, "Your children are making so much trouble for others and you don't stop them but encourage them by smiling. You should let them know how to do correctly."
To everyone's surprise, the father said, "My wife went to her hometown to visit her parents, but there she died from an accident(事故)yesterday. I really don't know how to explain to them they will never be able to see their mother again."
Hearing this, everyone was surprised. Till then, they realized that they shouldn't say whether people are good or not before truly knowing them.