"[Working with Callas was] like nothing else. Compared to nothing. I would say singers are reproductive artists, but she was a creative artist. She was in the role so much, it was fabulous, fabulous. She was very modest, very easy. But I think she saw red when she saw a journalist. But I could discuss a breath or anything with her. She didn't really have an ego when it came to the work. Her curse was that she was so musical, so intelligent, that she could take on roles that her voice couldn't handle. But what she did was always wonderful. There's a good example of what I mean. Callas — artist. Tebaldi — wonderful singer."