Original: Educated at Christ 's Hospital and the Royal College of Music , Lambert was a prodigy , writing orchestral works from the age of 13 , and at 20 received a commission to write a ballet for Serge Diaghilev 's Ballets Russes ( Romeo and Juliet ) .
Simplified: Lambert thought he had failed as a composer , and only finished two more big works in the last sixteen years of his life .