Based on its opening chapter, what are the foundational themes introduced in the Sai Satcharitra?

The foundational themes introduced in Chapter 1 of the Sai Satcharitra are humility, the necessity of divine grace, and the supreme, all-encompassing nature of Sadguru Sainath. The chapter, titled 'Mangalacharan' (Invocations), begins with the author offering salutations to deities like Ganesha and Saraswati, demonstrating that any great work requires divine blessings for its obstacle-free completion. More profoundly, this chapter establishes a core teaching of the book: Sai Baba is not separate from these deities. The text explicitly states that Sai himself is Ganesha, the remover of obstacles, and Saraswati, the source of knowledge, thus presenting him as the ultimate, non-dual reality.