“All the knowledge I possess everyone else can acquire, but my heart is all my own.”
—Johann Wolfgang von Goethe
We all have emotional experiences that linger in our memories. We have deep memories of the birth—or death—of a child, of our graduation day, and of working hard to achieve a sought-after reward and gaining or failing to gain it. Positive or negative, such emotional experiences stay with us for the rest of our lives. In the United States, people remember details about where they were when they heard that President John F. Kennedy had been shot (Dave was in class in grade school, it was a sunny day, and the adults all around him were in tears) or when Neil Armstrong walked on the moon (Norm was on a camping vacation ...