What does Chapter 6 say about the significance of a Sadguru's touch, specifically when Sai Baba places his hand on a devotee's head?

Chapter 6 of the Sai Satcharitra elaborates on the profound power of the Sadguru's touch. When Sai Baba places his blessing hand, sometimes with Udi from the Dhuni, on a devotee's head, it is said to make the heart overflow with self-bliss and love. This wondrous touch has the power to burn away the subtle body or ego, which even the fire of dissolution cannot destroy. The chapter further states that by placing His lotus-hand on the head, the accumulated impurities of many births are washed away, leaving Sai's loving devotees pure and their nonsensical speech stabilized.