Talent
Talent is great and immutable. Take the case of Liszt, for instance. I recently heard from a reliable source the following interesting story: One day Liszt was called away from his class at Wiemar by an invitation to visit the Grand Duke. Von Bülow, then a mature artist, was present, and he was asked by Liszt to teach the class for the day. Liszt left the room, and a young student was asked to play one of Liszt's own compositions. Von Bülow did not like the youth's interpretation, as he had been accustomed to play the same work on tour in a very different manner. Consequently he abused the student roundly, and then sat at the keyboard and was playing to his great satisfaction when the tottering old master broke in the room and with equal severity reprimanded Von Bülow, and sat down at the keyboard and gave an interpretation that was infinitely superior to that of Von Bülow. It was simply a case of superiority of talent that enabled the aged and somewhat infirm Liszt to excel his younger contemporary.