The eight sections of the present essay are drawn from the lectures I delivered at Princeton University and at the University of California, Los Angeles, in 1969-1970. Because of the diverse nature of the audience I did not go into the details that would be necessary in a new approach to a traditional problem. Instead, my principal aim was to present a brief sketch of the contents of what may be called Persian mysticism, while showing at the same time the remarkable role that this variety of Islamic mysticism has played in the cultural development of Persia.

The origins of Sufism—as Islamic mysticism is generally called—presents a very controversial problem indeed, but that Persia was the cradle of early Sufism is beyond doubt. Moreover, if mysticism is taken to be—as it usually is—an expression of man's belief in direct connection with the godhead, the well-known ethical concepts of the Zoroastrians—for whom every particular deed of daily life, good or bad, is the joint product of man and either the principle of Good or of Evil—might also be considered as unconscious expressions of a pantheistic type of mysticism.