In Chapter 41, Poem 21 of Attar's Mokhtar Nameh, the poet illustrates the profound depth of spiritual sorrow and complete self-sacrifice in the path of love. The heart is described as sinking entirely into the Beloved's sorrow, losing all traces of its own existence. Despite sacrificing everything at the Beloved's feet, it finds nothing but regret, emphasizing the painful, consuming, and often unrequited nature of total surrender in mystical love.