It is very well known to all who have any knowledge of Sufis and Sufism, that music plays a great part in their spiritual attainment. The Chishtis, a particular school of Sufis, take a special interest in music. They call it Ghiz-i-ruh, the food of the soul, and they listen to the Qawwali, the special songs sung at their Suma, the contemplative musical assembly. It seems as if some potent life were there which is rarely met with elsewhere.