Is ʿirfān islamic?

Not a new question but a timely one given the political context of the hegemony of the school of Mullā Ṣadrā as well as the rising popularity of the alliance of the maktab-e tafkīk (who call themselves maktab-e ahl-e bayt) and the Shīrāzīya against the study of philosophy especially in the ḥawzeh.