One day a teacher asked her students to list the names of the other students in the room on two sheets of paper, leaving a space between each name. Then she told them to think of the nicest thing they could say about each of their classmates and write it down. It took the remainder of the class period to finish their assignment, and as the students left the room, each one handed in the papers. That Saturday, the teacher wrote down the name of each student on a separate sheet of paper, and listed what everyone else had said about that individual. On Monday she gave each student his or her list. Before long, the entire class was smiling. "Really?" she heard whispered. "I never knew that I meant anything to anyone!" and, "I didn't know others liked me so much," were most of the comments. No one ever mentioned those papers in class again. She never knew if they discussed them after class or with their parents, but it didn't matte...