How does the Satcharita explain the concepts of birth and death, especially for enlightened beings like Sai Baba?

Chapter 43 defines birth as the union of the body and senses, and death as their separation. However, it clarifies that for great souls who incarnate by their own will purely for the welfare of devotees, these concepts are merely false imaginations. The text states that Sai Samarth, being the complete Supreme Brahman and a mass of bliss, is beyond the concepts of birth and death. His physical departure is likened to a solar eclipse, which is described as a defect of vision rather than the end of the sun. For such beings who have placed their feet on the head of Time, death is like dust before them, as they are not subject to the same laws as ordinary people.