In Attar's Mosibat Nameh, the allegory of the stranger who becomes a vizier and later seeks retirement due to the fear of death illustrates the irreplaceable value of life's capital (naqd-e omr). When the king demands that he leave empty-handed as he arrived, the vizier requests the return of the life he spent in the king's service. This parable emphasizes that worldly honors and wealth are fleeting, and the true tragedy is squandering one's limited lifespan in the service of worldly rulers rather than spiritual devotion.