In Chapter 43, Poem 21 of Attar's Mokhtar Nameh, the poet explores the theme of profound, incurable inner pain. The speaker describes a heartache so deep that it remains undiminished as long as life lasts. To convey the extraordinary magnitude of this suffering, the poet employs hyperbole, claiming that a single night of his own pain far exceeds the collective sorrow of all the people in the world. This emphasizes the intense, unique, and isolating nature of spiritual or romantic agony in the collection.