"That is such a difficult question. There are times when certain people are blessed — and cursed — with an extraordinary gift, in which the gift is almost greater than the human being. Callas was one of these people. It was as if her own wishes, her life, her own happiness were all subservient to this incredible, incredible gift that she was given, this gift that reached out and taught us things about music that we knew very well, but showed us new things, things we never thought about, new possibilities. I think that is why singers admire her so. I think that’s why conductors admire her so. I know it’s why I admire her so. And she paid a tremendously difficult and expensive price for this career."
January 1, 1970
https://en.wikiquote.org/wiki/Maria_Callas