"Kashf al-mahjúb is the oldest Persian treatise on Sufism and was written by the eminent Sufi thinker Hujwiri, also known as Ali ibn Uthman. In his book, the author examines the basic principles and practices of Sufi teachings, reveals the secrets of spiritual development and the path to knowledge of God through meditation and inner experience. The Kashf al-mahjúb remains one of the key works of the early period of Sufi literature and is required reading for anyone interested in the mystical tradition of the East."