In Jalaluddin Rumi's Masnavi, within the 'Tale of the Bedouin Arab and His Wife,' Rumi employs the metaphor of a 'salty spring' ($چشمهٔ شور$) to illustrate the limitations of worldly perception. The Bedouin, believing his jug of rainwater to be an unmatched treasure, is compared to a bird that only knows brackish water and is entirely ignorant of majestic rivers like the Shatt, Oxus, and Euphrates. Rumi extends this allegory to those trapped in the 'perishing caravanserai' of the material world, asserting that they cannot genuinely comprehend profound spiritual states such as 'annihilation' ($محو$), 'intoxication' ($سکر$), and 'expansion' ($انبساط$). He argues that even if worldly individuals know the names of these divine states, their understanding is merely imitative—passed down from ancestors or recited mechanically. Rumi compares this superficial knowledge to children memorizing the alphabet ($ابجد$); while the letters are visible and easily spoken, their true, deeper meaning remains vastly distant.