In this section of Hujwiri's Kashf al-Mahjub—the earliest surviving Persian prose treatise on Sufism—the author analyzes the meaning of the Sufi garment. He holds that abandoning habit (tark-e 'adat) is not itself a condition of the path. He gives two reasons his contemporaries wore less wool (pashmin): supplies of wool had been disrupted by raids, and certain heretics (mubtadi'a) had adopted the woolen robe as their badge, so that departing from the innovators' emblem—though outwardly a break from custom—became a following of the sunna. He then treats the patched cloak (muraqqa'): as the Sufis' standing among people grew, imitators put on the cloak while behaving unworthily, so the genuine Sufis devised a distinctive stitching that only they knew how to sew, turning it into a private sign by which they recognized one another. The passage thus distinguishes true inner discipline from the outward garment mistaken for it.