How does the scripture explain the concepts of birth and death, particularly in relation to enlightened beings?

According to the teachings in chapter 43, birth is defined as the union of the body and senses, while death is their separation. For ordinary beings, death is an inseparable characteristic attached to birth. However, for great souls who incarnate by their own will for the welfare of devotees, birth and death are considered false imaginations. The text explains that a being who has metaphorically turned their body to ashes even before it falls has no fear of death, viewing it as mere dust. Death is described as the nature of the body and even a state of happiness for it, while life is seen as a modification of the body.