According to the text, what specific methods did Sai Baba use to help his devotees realize the Nirguna, and what was the underlying philosophy?

According to the detailed descriptions in Chapter 11, Sai Baba employed countless means to help his devotees realize the Nirguna, or unmanifest reality. To achieve this, he would sometimes 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 philosophy behind these actions was to cultivate a deep longing and constant mental occupation with Baba's company, even in his physical absence. This practice, as described in the chapter, was designed to help the devotee transcend attachment to the perishable body and focus on the eternal and deathless reality that Sai represents.