How to listen?

I've never known a human being who can be as still as Nelson Mandela.  When he is sitting or listening, he does not tap his fingers or his foot, or move about.  He has no nervous tics.  When I have adjusted his tie or smoothed his jacket or fixed a microphone on his lapel, it was like fussing with a statue.  When he listens to you, it is as though you are looking at a still photograph of him.  You would barely know he was breathing.

Richard Stengel in Mandela's Way, page 5

You would barely know he was breathing.