How does Chapter 30 contrast different types of devotees, and what is the ultimate source of spiritual attainment?

Chapter 30 contrasts learned Brahmins, who come from pilgrimage sites to perform recitations and read sacred texts, with the author, who feels he is 'devoid of proper samskaras and of little power.' However, the chapter resolves this contrast by emphasizing that Sai's grace is the ultimate source of attainment, not one's background or ritualistic knowledge. It states that upon whomever Sai bestows His grace, 'that one attains inconceivable great power' and the 'wealth of discrimination between Self and non-Self.' This highlights that Sai's grace is the key factor, and He does not forsake anyone, regardless of their perceived qualifications.