No, I think that a person writes a poem because they have an inner urge of something that they want to express, and I think it's that inner urge that you want to express when you write a piece of music.

Though he gave his last public concert before the age of forty he continued writing music for another half-century and beyond. His performances of works by avant-garde composers and his own innovative and even shocking pieces made him a cause célèbre on both sides of the Atlantic.