In Section 2 of the Twentieth Discourse of Attar's Asrar Nameh, the tale of a perfected old man who refuses to sleep day or night serves as a profound allegory for spiritual vigilance and existential anxiety. When questioned about his constant wakefulness, the old man explains that his awareness of the turmoil of heaven and hell, combined with the uncertainty of his own ultimate destination, makes sleep impossible for a wise person. Attar uses this narrative to illustrate the Sufi principle that true spiritual awareness requires a state of continuous inner restlessness, warning seekers against worldly complacency in the face of the afterlife's realities.