What methods did Sai Baba use to help his devotees realize the 'Nirguna' or formless reality, as mentioned in Chapter 11?

Chapter 11 describes several methods Sai Baba employed to guide his devotees from devotion to his physical (Saguna) form towards the realization of the formless (Nirguna). To cultivate a deeper longing for the eternal, he would use countless means tailored to the individual's eligibility. For example, as noted in the chapter, Baba might send a devotee to another country, enforce a period of solitude in Shirdi, confine someone to the Wada, or assign them the task of reading scriptures. By practicing these disciplines over many years, the devotee's mind would become constantly occupied with Baba’s company, transcending the physical and growing their attachment to the eternal reality.