The author explores the interplay between scriptural exegesis and mystical doctrine in a twelfth-century Sufi commentary on the Qur'an. Previously little-known outside the Persian-speaking world, it is increasingly recognized as a key work in the development of Sufi Qur'anic interpretation. Dr Keeler provides invaluable background for anyone wanting to gain a deeper understanding of Persian mystical poetry and prose, and other major works of Sufi literature.