In Poem 78 from Chapter 4 of Attar's Mokhtar Nameh, the poet addresses the heart, inviting it to look closely to escape the illusions of both worlds. The central imagery is the paradox of a casket (حقه) that is simultaneously "full of Him and empty" (هم حقه از او پر است و هم حقه تهی). This "delicate magic trick" (شعبدهٔ لطیف) illustrates a core Sufi perspective on Divine presence and the nature of reality: the universe is entirely filled with God's manifestation, yet utterly empty of any independent existence other than Him. It emphasizes both the all-encompassing immanence of the Divine and the illusion of separate, worldly existence.