"He's a real perfectionist. But I think that this fanaticism and and the extreme instrumental standards he set for himself prevent his imagination from taking flight and stop him expressing any real love for the work he's performing so impeccably. It's 'inspiration' that's missing. Is this a notion that's been banished from today's dictionaries? It would be a great shame if this were so. But – one doesn't judge a master."
January 1, 1970
https://en.wikiquote.org/wiki/Arturo_Benedetti_Michelangeli