Can you summarize the key teachings and historical points presented in Chapter 27 of the Sai Satcharitra?

Chapter 27 emphasizes the profound importance of the Guru's grace, explaining that true devotion leads to the subsiding of passions and the emergence of supreme love. It describes the business of 'I' and 'mine' as momentary Maya and advises surrendering to Sai with singular devotion to overcome it. This chapter also introduces a key historical event, mentioning the blessed Patil Chandbhai from the Nizam's state, who brought the Fakir Sai with him to Newasa, where Sai resided for six months.