In Book 1 of Jalaluddin Rumi's Masnavi, Rumi warns disciples (murid) against audaciously imitating the extraordinary or seemingly transgressive deeds of the spiritual master (wali). Using the analogies of medicine and fruit maturation, Rumi explains that while a skilled physician (the master) can safely consume rich sweetmeats (representing poisonous or worldly temptations), the same food will harm a sick patient (the disciple). Similarly, winter frost does not harm a ripe grape, but it destroys the unripe grape still on the vine. This principle emphasizes that disciples must remain within their spiritual bounds and focus on disciplined obedience rather than attempting to duplicate the master's unique spiritual immunities.