In Chapter 10, Poem 44 of Attar's Mokhtar Nameh, the poet employs the metaphor of the 'bird of the heart' to describe the soul's profound inward spiritual journey. Through the 'burning of the path'—representing the hardships of the mystical quest—the heart uncovers the divine secret. By undertaking a 'thousand-year journey within itself' every day, the soul ultimately achieves self-recognition behind the veil, illustrating the core Sufi principle that knowing oneself is the necessary path to understanding the ultimate truth.