What is the book's philosophical explanation for Sai Baba's death? Did he really die in the conventional sense?

According to the teachings in Chapter 43, Sai Baba did not die in a conventional sense. The text posits that for someone who is the 'complete Supreme Brahman,' the concepts of birth and death are 'false imaginations.' His physical passing is described as a voluntary act where he 'burned the body in the fire of Yoga' and 'merged himself into the unmanifest.' This chapter explains that death for saints is akin to an eclipse—a perceived event that is merely a 'defect of vision' for the observer, not a true end. It clarifies that when a saint's earthly task is complete, they simply merge back into their true, formless state, and it is considered improper to believe Baba was confined only to his physical body.