How does the Satcharita define birth and death from a spiritual perspective, and how does this apply to someone who has conquered them?

Chapter 43 provides a deep philosophical definition of birth and death, distinct from the common understanding. It states that the union of the body and senses is birth, while their separation is death. For ordinary beings, this cycle is binding. However, for enlightened souls who have 'placed their feet on the head of Time,' these are merely 'false imaginations.' The text explains that death is a natural characteristic of the physical body, even calling it a 'state of happiness for the body,' whereas life is a modification. A Yogi like Sai Samarth, who has burned the body in the fire of Yoga even before it falls, has no fear of death; it is like dust before him. For such beings, who are the complete Supreme Brahman, birth and death are irrelevant as they are devoid of bodily impulses and consciousness of the body as their true self.