It has been said that al-Ghazzali was the most important Muslim since the Prophet Muhammad. After al-Ghazzali, one great philosopher after another—Yahya Suhrawardi (d. 1191), Muid ad-Din ibn al-Arabi (1165–1240), Jalal ad-Din Rumi (1207–73), Mir Dimad (d. 1631), and his pupil Mulla Sadra (1571–1640)—insisted that theology must be fused with spirituality.
