How does Chapter 8 of the Sai Satcharitra describe the impermanent and unpleasant nature of the physical body and the passage of time?

In Chapter 8, the author emphasizes the transient nature of life, noting that days and years are consumed quickly, with much of life spent in sleep or restlessness. The body's journey through childhood, youth, and old age is described as a seamless, often unnoticed transition. Using the analogy of a lamp flame that appears constant but is different every moment, the text explains that the body is also in a state of constant flux, perishing and renewing from one moment to the next. It is unflinchingly described as a foul place, a 'washroom of excrement and urine,' filled with phlegm and pus, with death looming at every moment.