According to Chapter 6, what is the role of a Sadguru and what happens when Sai Baba places his hand on a devotee's head?

Chapter 6 of the Shri Sai Satcharitra explains that a Sadguru, like Sai Baba, is the helmsman who can guide a person's boat, whether in spiritual or worldly matters, to the far shore. The chapter places immense significance on the Guru's touch. It states that when Sai Baba places His blessing hand, along with Udi, on a devotee's head, their heart overflows with self-bliss and love. This divine touch is described as wondrously powerful, capable of burning away the subtle body of ego into ashes—something even the fire of dissolution cannot achieve. As mentioned in the chapter, this act washes away the accumulated impurities of many lifetimes, purifying the devotee.