According to the preface, what is the relationship between reading the Shri Sai Satcharita, the concept of 'Jnana-yagna', and the ultimate spiritual goal for a devotee?

The preface, as seen in Chapter 0, establishes a direct and profound relationship between reading the Shri Sai Satcharita and the highest spiritual attainment. Engaging with the text with faith is likened to consuming a 'sweet, spiritual treat.' This act of devout study is explicitly defined as performing a 'sacrifice of knowledge,' or 'Jnana-yagna.' Drawing from the Dnyaneshwari, the preface explains that through this process, a devotee offers the 'ignorance of the ego as an oblation' into the fire of knowledge, thereby satisfying the Supreme Soul. The ultimate spiritual goal, and the fruit of this Jnana-yagna, is the complete union with the divine; the text promises that such a devotee will 'undoubtedly become one with the six-fold glorious Shri Sai-Paramatma' after death.