What kind of higher knowledge can a devotee attain through Sai's grace, based on the teachings in Chapter 30?

Chapter 30 of the Sri Sai Satcharita reveals that a devotee can attain profound spiritual knowledge and power through Sai Baba's grace. It is mentioned that upon whomever Sai bestows His grace, that person 'attains inconceivable great power.' Specifically, as noted in Chapter 30, the text highlights the attainment of 'the wealth of discrimination between Self and non-Self,' which is a significant milestone in spiritual understanding. This implies that Sai's grace goes beyond material boons and grants the highest form of knowledge, enabling a devotee to discern eternal reality from the transient world and destroying the darkness of ignorance.