According to the teachings, what is the true nature of birth and death, and why was Sai Baba unaffected by them?

The teachings presented in Chapter 43 define birth as the union of the body and senses, while death is their separation. These two events are considered false imaginations for those who have achieved higher consciousness. Sai Baba was unaffected by them because he is described as the complete Supreme Brahman and a mass of bliss, devoid of bodily impulses. The text posits that for him who does not know the birth of the body, death is an impossibility. He incarnated by his own will for the welfare of devotees, and his apparent 'death' was a voluntary act of merging into the unmanifest through Yoga, showing that for saints, death is a mere defect of vision, like an eclipse.