In Chapter 21, Poem 16 of Attar's Mokhtar Nameh, the poet explores the futility of holding onto worldly sorrow and resisting the inevitable. The poem compares a person consumed by grief to a small starling relentlessly beating itself against a heavy iron anvil for a thousand years. This striking metaphor emphasizes that dwelling on the "sorrow of a wounded heart" is not only useless but also self-destructive, as the unyielding nature of time and fate (the anvil) remains entirely unaffected by the fragile, desperate struggles of the individual (the starling).