How does Chapter 6 of the Sai Satcharitra describe the power of a Sadguru's blessing?

Chapter 6 beautifully illustrates the profound power of a Sadguru's blessing, particularly through physical touch. It states that when the Sadguru, Sai Baba, places His hand on a devotee's head, it is often accompanied by Udi from the Dhuni. This simple act causes the heart to overflow with self-bliss and love to pour from the eyes. More profoundly, the text explains that the touch of the Guru's hand has a wondrous power to burn away the 'subtle body' of ego into ashes, an impurity that even the fire of dissolution cannot touch. This blessing purifies the devotee by washing away the accumulated impurities of many past births, as mentioned throughout the early verses of this chapter.