What methods did Sai Baba use to help his devotees realize the Nirguna, as described in Chapter 11?

To help his devotees realize the Nirguna, or formless reality, Sai Baba employed countless different methods tailored to their eligibility. As Chapter 11 describes, he would sometimes keep them at a distance or even forbid them from seeing him for long periods. He might send one devotee to another country, confine another to solitude within Shirdi, lock someone in the Wada, or assign them the task of reading scriptures. By practicing these disciplines for years, the devotee's longing for the Nirguna would grow, and their mind would become constantly occupied with Baba's company, thus shifting their focus from the physical to the eternal.