أحمد الطيب
In the modern world, the classical interpretation of Sunni orthodoxy, which sees in Sufism an essential dimension of Islam alongside the disciplines of jurisprudence and theology, is represented by institutions such as Egypt's Al-Azhar University and Zaytuna College, with Al-Azhar's current Grand Imam Ahmed el-Tayeb recently defining "Sunni orthodoxy" as being a follower "of any of the four schools of [legal] thought (Hanafi, Shafi’i, Maliki or Hanbali) and ... [also] of the Sufism of Imam Junayd of Baghdad in doctrines, manners and [spiritual] purification."