According to the teachings, what is the true nature of birth and death, and how does this relate to Sai Baba?

Chapter 43 explains that birth is simply the union of the body and senses, while death is their separation; they are inseparable from each other. However, for a being like Sai Samarth, who is described as a mass of bliss and the complete Supreme Brahman, these concepts are considered false imaginations. As Chapter 43 clarifies, for one who does not know the birth of the body, how can there be death for his body? He is devoid of bodily impulses, and from the perspective of Brahman, the world is an illusion, making consciousness of the body irrelevant for him.