How does listening to Sai Baba's life story, or 'Charitra', benefit a devotee?

Chapter 3 describes listening to Sai Baba's life story as a powerful spiritual practice with tangible benefits. Baba assures that by writing and listening to his divine play, the 'faults of ignorance (Avidya) will be destroyed.' For those who listen with devotion, the 'consciousness of worldly affairs (Prapancha) will fade away,' and 'waves of the nectar of devotion and love will rise.' The text also makes a remarkable claim that 'by merely listening to my stories, diseases will be cured.' This act of listening and contemplating is said to bring peace, transcend the mind, and ultimately allow the devotee to find 'gems of knowledge (Bodha-ratne).'