For as long as Halley Steen has known her husband Nathan, he has carried a handful of stones in his pocket. Each day he uses those stones to remind him to follow the Golden Rule, moving a stone from one pocket to the other with each act of kindness. So it's not unusual that Nathan stops to help a stranger on the side of the highway while on his way to his son's football game one Friday evening. But that one act will change all of their lives forever,...