In Poem 21 of Attar's Mokhtar Nameh (Chapter 4), the metaphor of the ocean (the Divine) and the drop (the individual soul) illustrates the illusion of separation and the ultimate unity of existence. The poem explains that the 'two worlds' are invisible within the vastness of the Divine ocean, and anything other than God is merely a 'display of illusion.' When the seeking drop finally reaches the ocean, it realizes it had always been a part of it, signifying that the soul's unity with the Divine is eternal and its perceived separation was only an illusion.