Provide an overview of the main teachings and events described in Chapter 22 of the Shri Sai Satcharitra.

Chapter 22 of the Shri Sai Satcharitra presents a blend of profound philosophy and a miraculous story. It begins with invocations praising the Sadguru as the destroyer of worldly fear and the master of illusion, using the rope-and-snake analogy to explain his nature. The chapter emphasizes that the only path to true happiness is devotion at the Guru's feet, where devotees "plunder personal happiness with love." The central event narrated in Chapter 22 is how Sai Baba fulfills Das Ganu's wish to visit Prayag by miraculously manifesting the Ganga and Yamuna rivers from his own big toe, teaching that the Guru's presence is the holiest of all pilgrimages.