How did Sai Baba guide his devotees towards understanding the formless (Nirguna) reality, according to Chapter 11?

According to Chapter 11, Sai Baba employed various methods to help his devotees realize the Nirguna, or formless, aspect of the divine. He would tailor his approach based on their individual eligibility. For instance, he might send a devotee to another country, confine another to solitude in Shirdi, lock someone in the Wada, or assign them the task of reading scriptures. The chapter explains that by practicing these disciplines over many years, the devotees' longing for the Nirguna would grow, and their minds would become constantly occupied with Baba's company, leading them from the perishable physical form to an understanding of the eternal.