I have a good friend, Rudolf Serkin, the pianist, a very sensitive man. I was talking to him one day backstage after a concert and I told him that I thought he had played particularly sensitively that day. I said, “You know, many pianists are brilliant, they strike the keys so well, but somehow you are different.” “Ah,” he said, “I don’t think you should ever strike a key. You should pull the keys with your fingers.”