Could you explain the spiritual significance of the dhuni for Sai Baba, based on the provided text?

The dhuni, or sacred fire, was central to Sai Baba's spiritual practice as described in Chapter 5. Beyond its practical use for warmth, it was a powerful symbol of purification and surrender. The text explains that Baba offered his ego, desires, mental tendencies, and all worldly inclinations as oblations into this fire. He metaphorically placed the "log of knowledge and pride" into the fierce fire-pit, signifying the annihilation of the self and complete submission to the divine. His constant chant of "Allah-Malik" (God is the Master) while seated before the dhuni underscored this act of surrender.