BBC reports:

Iranian Sufis say Islamic mysticism has become more and more popular in the country in recent years.

No official statistics are available, but Heshmatollah Riazi, a former professor of philosophy and theology in Iran, believes two to five million Iranians practice Sufism today – compared to only about 100,000 before Iran’s Islamic Revolution of 1979.

Full Story: BBC: Growing popularity of Sufism in Iran

(via Robot Wisdom).