According to the text, what methods did Sai Baba use to help his devotees realize the Nirguna (formless) reality?

To guide his devotees from devotion to the manifest (Saguna) towards the realization of the unmanifest (Nirguna), Sai Baba employed various unique methods. As described in Chapter 11, he would tailor his approach to the individual's eligibility. The text mentions that Baba would send one person to another country, confine another to solitude within Shirdi, lock a devotee in the Wada lodging, or assign them the specific task of reading scriptures. Chapter 11 explains that by practicing these disciplines over many years, the devotees' longing for the Nirguna would grow, occupying their minds constantly.