'Slaughter your ego with the knives of mujahada.' [9] Once the nafs is controlled, then the heart is clear, and the virtues proceed from it easily and naturally. Because its objective is nothing less than salvation, this vital Islamic science has been consistently expounded by the great scholars of classical Islam. While today there are many Muslims, influenced by either Wahhabi or Orientalist agendas, who believe that Sufism has always led a somewhat marginal existence in Islam, the reality is that the overwhelming majority of the classical scholars were actively involved in Sufism.
The early Shafi'i scholars of Khurasan: al-Hakim al-Nisaburi, Ibn Furak, al-Qushayri and al-Bayhaqi, were all Sufis who formed links in the richest academic tradition of Abbasid Islam, which culminated in the achievement of Imam Hujjat al-Islam al-Ghazali. Ghazali himself, author of some three hundred books, including the definitive rebuttals of Arab philosophy and the Ismailis, three large textbooks of Shafi'i fiqh, the best-known tract of usul al-fiqh, two works on logic, and several theological treatises, also left us with the classic statement of orthodox Sufism: the Ihya Ulum al-Din, a book of which Imam Nawawi remarked:
"Were the books of Islam all to be lost, excepting only the Ihya', it would suffice to replace them all." [10] Imam Nawawi himself wrote two books which record his debt to Sufism, one called the Bustan al-Arifin ('Garden of the Gnostics', and another call
