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

According to Chapter 6 of the Sai Satcharitra, the touch of a Sadguru like Sai Baba is profoundly transformative. When the Sadguru places his blessing hand, along with Udi from the Dhuni, upon a devotee's head, it causes the heart to overflow with self-bliss. This touch is described as wondrously powerful, capable of burning away the subtle body or ego into ashes, something even the fire of dissolution cannot do. The text further elaborates that by placing his lotus-hand on the head, the Sadguru washes away the accumulated impurities of many past births, making Sai's devotees pure.