How does this text explain the concepts of birth and death, particularly for someone like Sai Baba?

According to Chapter 43, birth is defined as the union of the body and senses, while death is their separation. However, for enlightened beings who incarnate by their own will, these concepts are considered "false imaginations." The text explains that Sai Baba is the "complete Supreme Brahman" and a "mass of bliss," for whom birth and death are irrelevant. As stated in Chapter 43, death is a characteristic of the physical body, which is merely an adjunct for saints. They are essentially "beyond the womb" and their incarnation is for the purpose of helping others. For them, death is not an end but a merging back into their true, unmanifest form.