Observing people who are listening, that is what Rudolf Giesselmann's photo book is about. The content of the book easily is explained by a quote of Dr. Karl A. Menninger (1893 - 1990, American psychiatrist):
"Listening is a magnetic and strange thing, a creative force. The friends who listen to us are the ones we move toward. When we are listened to, it creates us, makes us unfold and expand."