A.R. Rahman`s `Kun Faya Kun` performed live by The Berklee Indian Ensemble at Symphony Hall, Boston. Sufism, the mystical sect of Islam, is partly characterized by its rich musical tradition, primarily based on the writings of Sufi poets such as Rumi, Amir Khusrau, and Bulleh Shah. Well known for drawing influence from his faith and the Sufi tradition, A.R. Rahman, composed this beautiful Qawwali for the 2011 film, Rockstar, with lyrics penned by Irshad Kamil.