Grandpa explains that the golden rule is a simple statement on how to live that can be practiced by people of all ages and faiths, then helps his grandson figure out how to apply the rule to his own life.

"Once upon a morning in Hong Kong, in the alley of Tai Yuen Street, a girl is promised a mooncake with a double-yolk center ... the special mooncake seems like the only excitement on an otherwise boring day in the market where nothing changes ... until an exhausted stranger falls to his knees right in the street! He ran through forests, swam through rivers, and even stowed away on a ship, all to get to Hong Kong. Now at the end of his journey, all...