The story is told of a famous child psychologist who spent many hours constructing a new driveway at his home. Just after he smoothed the surface of the freshly poured concrete, his small children chased a ball across the driveway, leaving deep footprints.

The man yelled after them with a torrent of angry words. His shocked wife said, "You're a psychologist who's supposed to love children."

The fuming man shouted, "I love children in the abstract, not in the concrete!”