Can you summarize the main teachings and stories from Chapter 22 of the Shri Sai Satcharitra?

Chapter 22 begins with invocations to the Sadguru, describing him as the embodiment of bliss and the destroyer of worldly fears. A central teaching uses the metaphor of a snake and a rope to explain illusion and reality, identifying the Guru as the one who both creates and ultimately dispels this illusion. The chapter also contains a beautiful story about Das Ganu, who wished to bathe at the holy site of Prayag. Sai Baba told him that His own big toe was Prayag, and when Das Ganu placed his head on Baba's feet, the holy waters of the Ganga and Yamuna rivers miraculously flowed from it. This illustrates the immense spiritual power contained within the Sadguru, as detailed in Chapter 22.