According to Hemadpant in Chapter 43, what is the most effective way to achieve inner purity, and how does he connect this to the chapter's narrative?

In Chapter 43, the author Hemadpant states that to wash away the 'filth of accumulated sins' and make the inner self pure, other means are useless compared to the remembrance of God's devotees. He specifies that bhajan (devotional singing) or kirtan (devotional chanting) are the easiest and most effective means for purifying the mind. He connects this idea to the narrative by framing the entire chapter as an act of devotion. He is sketching Sai's life story as a form of remembrance, believing that Sai himself grants the devotion and that recounting this story gives glory to the religion of bhajan and helps end worldly existence, thus purifying the listener.