I heard this story today & loved it!
Pablo Casals was a Catalan and Puerto Rican cellist, composer, and conductor. He is generally regarded as the pre-eminent cellist of the first half of the 20th century and one of the greatest cellists of all time. At the age of 90, he still practiced on a daily basis.
A reporter asked him, “Why does a man of your skill & talent continue to practice?”
Casals replied seriously, “I think I’m finally beginning to make some progress.”