In Chapter 20, Poem 3 of Attar's Mokhtar Nameh, the poet explores the limits of human expression regarding profound spiritual truths. He asserts that the "secret of the soul" (سر جان) remains inherently inexpressible as long as one is tied to physical existence and "breath" (نفس). The paradox of manifestation is highlighted: even when hidden truths seem apparent, their deepest essence cannot be adequately conveyed in words.

Furthermore, the poem emphasizes the spiritual value of enduring hardship (ناکامی) with resilience and courage. The ultimate reward for such endurance is not a material gain, but a spiritual fulfillment or "wish" (کام) that, like the soul's secret, transcends language and cannot be described to others. This reflects a common Sufi theme where the most profound spiritual experiences and divine rewards are ultimately ineffable.