According to Chapter 6, what is the transformative effect of the Sadguru's touch on a devotee's ego and past impurities?

Chapter 6 of the Sai Satcharitra details the transformative power of the Sadguru's touch. It states that the Guru's hand can burn away the subtle body, which is the ego, into ashes. This is a wondrous power, as the ego is something that cannot be destroyed even in the fire of dissolution. Furthermore, the chapter explains that by placing His lotus-hand on a devotee's head, the accumulated impurities from many previous births are completely washed away, rendering the devotee pure. This process, as described in Chapter 6, is a key aspect of the spiritual purification granted by Sai's grace.