How does Chapter 6 explain the Sadguru's role in dealing with a disciple's ego and mental impurities?

The initial verses of Chapter 6 provide a powerful description of the Sadguru's role in spiritual purification, particularly concerning the ego. The text uses a strong metaphor, stating that the Sadguru can burn away the subtle body, or ego, into ashes with the mere touch of His hand—a feat that even the fire of cosmic dissolution cannot accomplish. It also explains that if a devotee's mind wanders into idle gossip, the Guru grants stability to their nonsensical speech. Furthermore, as detailed in Chapter 6, by placing His lotus-hand on a disciple's head, the accumulated impurities of many past births are washed away, making Sai's loving devotees pure and awakening the sense of 'I am He' (Soham).