In Chapter 17, Poem 10 of Attar's Mokhtar Nameh, the poet addresses the heart, urging a transition from outward expression (speech) to inward receptivity (listening). By employing the metaphor of having been a 'tongue from head to toe' and commanding the heart to now 'become an ear', Attar emphasizes the spiritual necessity of silence and contemplation over the futile 'wandering in blood' caused by excessive utterance.