Sufism has made significant contributions to the spread of Islam and the development of various aspects of Islamic civilisation. Many conservative Muslims disagree with many popular Sufi practices, particularly saint worship, the visiting of tombs, and the incorporation of non-Islamic customs. Consequently, in recent centuries Sufism has been a target for Islamic reformist and modernist movements. Nasr is the preeminent Sufi scholar in the U.S., and in the tradition of Martin Buber's I and Thou, here provides the beliefs and vision of the mystical heart of Islam. A gentle anitdote to the extremist Muslim fundamentalists who capture the headlines and taint our perception of the world's fastest growing religion.