There can be no better way to obtain a good idea of the concept of knowledge among Sufis in the fifth century AH than a careful inquiry into the writings of Abū al-Qāsim ʿAbd alKarīm b. Hawāzin al-QUSHAYRĪ (d. 465/1072), the author of the Risāla fī ʿilm al-taṣawwuf (Epistle on Sufism), one of the most important works ever written on the subject, also known as al-Risāla al-Qushayriyya.
Souece: Journal of Arabic and Islamic Studies
Click here to read more.