In Poem 99 of Chapter 4 of Attar's Mokhtar Nameh, the poet employs the metaphor of the heart as a falcon (باز دل) that sustains itself on divine grief. This spiritual nourishment elevates the heart to the highest celestial realm, placing its banner on the 'seventh heaven.' Consequently, the seeker is liberated from the attachments and concerns of 'both worlds' (the material universe and the hereafter). By placing the thought of both worlds 'in a casket,' the poem illustrates absolute detachment and exclusive focus on the Divine.