Sayyid Mu¿ammad ¿usayn ¿abäaba'i (1901-1982) was a prominent Muslim scholar who taught Islamic philosophy, jurisprudence, ethics, and gnosis in the seminaries of Qum, Iran. He is celebrated for the example of his spiritual life and for his spiritual writings. Sayyid Mu¿ammad ¿usayn ¿usayni Tihrani (1925-1995) was one of Tabataba'i's most brilliant students. A teacher, eloquent speaker, and prolific writer, his most important works include comprehensive studies on the nature of God, the lives and spiritual status of Shii Imams, and eschatology. Formerly a Professor at the University of Tehran, Mohammad H. Faghfoory is affiliated with George Washington University and the Institute of Ismaili Studies in London.