In Chapter 11, Poem 46 of Attar's Mokhtar Nameh, the poet explores the profound paradox of mystical experience: the soul and heart are overflowing with spiritual truths ('pearls of secrets'), yet the mystic is entirely incapable of articulating them. The metaphor of a 'nail upon the tongue' (بر زبان مسمار است) powerfully illustrates this ineffability, emphasizing that ultimate divine secrets cannot be conveyed through ordinary human speech. Instead, the soul remains captivated by the divine vision and the heart bewildered, leaving the mystic in a state of silent, overwhelming realization.