According to Chapter 11, what methods did Sai Baba use to help his devotees realize the Nirguna (formless) aspect of divinity?

Chapter 11 details the various means Sai Baba employed to guide his devotees from devotion to his manifest form towards realizing the formless (Nirguna). According to the text, he used countless methods tailored to each devotee's eligibility. For instance, Baba would sometimes send a devotee to another country, confine another to solitude within Shirdi, lock someone in the Wada lodging, or assign them the task of reading scriptures. As Chapter 11 explains, through these practices over many years, the devotee's longing for the Nirguna would grow, and their mind would become constantly occupied with Baba’s eternal presence, transcending his physical body.