to the "supererogatory level" through simultaneously "fulfilling ... [the obligatory] religious duties" and finding a "way and a means of striking a root through the 'narrow gate' in the depth of the soul out into the domain of the pure arid unimprisonable Spirit which itself opens out on to the Divinity." Academic studies of Sufism confirm that Sufism, as a separate tradition from Islam apart from so-called pure Islam, is frequently a product of Western orientalism and modern Islamic fundamentalists. As a mystic and ascetic aspect of Islam, it is considered as the part of Islamic teaching that deals with the purification of the inner self. By focusing on the more spiritual aspects of religion, Sufis strive to obtain direct experience of God by making use of "intuitive and emotional faculties" that one must be trained to use. Tasawwuf is regarded as a science of the soul that has always been an integral part of Orthodox Islam. In his Al-Risala al-Safadiyya, ibn Taymiyyah describes the Sufis as those who belong to the path of the Sunna and represent it in their teachings and writings. Ibn Taymiyya's Sufi inclinations and his reverence for Sufis like Abdul-Qadir Gilani can also be seen in his hundred-page commentary on Futuh al-ghayb, covering only five of the seventy-eight sermons of the book, but showing that he considered tasawwuf essential within the life of the Islamic community. In his commentary, Ibn Taymiyya stresses that the primacy of the sharia forms the soundest tradition in tasawwuf, and to argue this point he lists over a dozen early masters, as well as more contemporary shaykhs like his fellow Hanbalis, al-Ansari al-Harawi and Abdul-Qadir, and the latter's own shaykh, Hammad al-Dabbas the upright. He cites the early shaykhs (shuyukh al-salaf) such as Al-Fuḍayl ibn ‘Iyāḍ, Ibrahim ibn Adham, Ma`ruf al-Karkhi, Sirri Saqti, Junayd of Baghdad, and others of the early teachers, as well as Abdul-Qadir Gilani, Hammad, Abu al-Bayan and others of the later masters— that they do not permit the followers of the Sufi path to depart from the divinely legislated command and prohibition. Al-Ghazali narrates in Al-Munqidh min al-dalal: Formalization of doctrine In the eleventh-century, Sufism, which had previously been a less "codified" trend in Islamic piety, began to be "ordered and crystallized" into orders which have continued until the present day. All these orders were founded by a major Islamic scholar, and some of the largest