Ali Hujwiri—The author of the Persian Sufi text "Kashf ul Mahjoob" (Revelation of the Veiled) Hujwiri argues, along with Al-Kushayri that very few "real" Sufis exist anymore in his time; rather, there are a large number of “false pretenders” which he calls "mustaswif"—“the would-be Sufi”. In his text, Hujwiri describes the “veils which should be lifted” in order to purify one's heart and really pursue Sufism. Hujwiri argues for the importance of “morals” over “formal practice” in Sufism. He was the first to directly address the problematic diversity in Muslim belief during his time. In "Kashf ul Mahjoob", he describes various Sufi approaches to theoretical ideas, linking them to particular key Sufi figures.