The Rite of Spring the winter of 1909–10, in close association with Fokine who was choreographing "The Firebird". During this period Stravinsky made the acquaintance of Nijinsky who, although not dancing in the ballet, was a keen observer of its development. Stravinsky was uncomplimentary when recording his first impressions of the dancer, observing that he seemed immature and gauche for his age (he was 21). On the other hand, Stravinsky found Diaghilev an inspiration, "the very essence of a great personality". "The Firebird" was premiered on 25 June 1910, with Tamara Karsavina in the main role, and was a great public success. This ensured
The Rite of Spring of musical language that they could never again be put together as before". The academic and critic Jan Smaczny, echoing Bernstein, calls it one of the 20th century's most influential compositions, providing "endless stimulation for performers and listeners". According to Kelly the 1913 premiere might be considered "the most important single moment in the history of 20th century music", and its repercussions continue to reverberate in the 21st century. Ross has described "The Rite" as a prophetic work, presaging the "second avant-garde" era in classical composition—music of the body rather than of the mind, in which "[m]elodies would follow the