What are the primary teachings and narratives found in Chapter 22 of the Shri Sai Satcharitra?

Chapter 22 of the Shri Sai Satcharitra begins with invocations and salutations, then delves into a profound philosophical discussion using the analogy of a snake and a rope to explain illusion and reality. It describes Sadguru as the creator of illusion (the snake in dim light) and also the one who reveals the truth (the rope in light). The chapter then shifts to the importance of the Guru's feet for devotees, explaining how they find happiness by placing their heads there. As detailed in Chapter 22, this leads into the story of how Sai Baba demonstrated the sanctity of his own feet to Das Ganu, who wished to visit Prayag for a holy bath. Baba manifested the Ganga and Yamuna from his big toe, proving that devotion at the Guru's feet contains all pilgrimages.