In Book 2 of Jalaluddin Rumi's Masnavi, within the tale of the Shaykh who feigns madness, Rumi explores the epistemological challenge of identifying a spiritually perfect master ($wali$) who has chosen to conceal their rank. When a saint adopts 'madness as a veil' to hide from worldly expectations, ordinary human intellect becomes completely inadequate for recognizing them. Rumi metaphorically compares the spiritually blind relying on intellect to a blind man robbed by a sighted thief; the blind man feels the effects but cannot perceive the identity of the actor. To see the 'Moses' hidden within a 'coarse cloak' or the 'commander beneath every stone,' the seeker must instead possess the 'eye of certainty' ($dideh-ye yaqin$). Ultimately, Rumi asserts that intellectual deduction fails, and only another saint, or one endowed with spiritual vision, can truly recognize a concealed friend of God.