Analysis of information sources in references of the Wikipedia article "A Late Quartet" in English language version.
The greater was my shame and delight when, a few years later, I met Casals in Paris. We had dinner together and played duets for two cellos, and I played for him until late at night. Spurred by his great warmth, and happy, I confessed what I had thought of his praising me in Berlin. He reacted with sudden anger. He rushed to the cello. 'Listen!' He played a phrase from the Beethoven sonata. 'Didn't you play this fingering? Ah, you did! It was novel to me... it was good... and here, didn't you attack that passage with up-bow, like this?' He demonstrated. He went through Schumann and Bach, always emphasizing all he liked that I had done. 'And for the rest,' he said passionately, 'leave it to the ignorant and stupid who judge by counting only the faults. I can be grateful, and so must you be, for even one note, one wonderful phrase.' I left with the feeling of having been with a great artist and a friend.
The greater was my shame and delight when, a few years later, I met Casals in Paris. We had dinner together and played duets for two cellos, and I played for him until late at night. Spurred by his great warmth, and happy, I confessed what I had thought of his praising me in Berlin. He reacted with sudden anger. He rushed to the cello. 'Listen!' He played a phrase from the Beethoven sonata. 'Didn't you play this fingering? Ah, you did! It was novel to me... it was good... and here, didn't you attack that passage with up-bow, like this?' He demonstrated. He went through Schumann and Bach, always emphasizing all he liked that I had done. 'And for the rest,' he said passionately, 'leave it to the ignorant and stupid who judge by counting only the faults. I can be grateful, and so must you be, for even one note, one wonderful phrase.' I left with the feeling of having been with a great artist and a friend.