How does Chapter 6 of the Sai Satcharitra describe the power and effect of a Sadguru's touch, specifically referring to Sai Baba?

Chapter 6 elaborates on the profound power of a Sadguru's touch, explaining that when Sai Baba places his blessing hand on a devotee's head, their heart overflows with self-bliss. This touch, often accompanied by Udi from the Dhuni, is described as wondrous. It possesses the ability to burn away the subtle body, or ego, into ashes—something that even the fire of dissolution cannot accomplish. Furthermore, the chapter states that by placing His lotus-hand on the head, the accumulated impurities from many past births are washed away, purifying Sai's loving devotees and causing tears of joy to flow.