What metaphors and descriptions does Chapter 8 use to illustrate the impermanence and nature of the physical body?

Chapter 8 employs powerful imagery to convey the transient nature of the physical body. It uses the analogy of a lamp's flame, which appears constant but is different every moment, to explain how the body is continuously changing. The text states that what is seen one moment perishes in the next. It further describes the body in stark terms as a "washroom of excrement and urine" and a "foul place of phlegm, pus, and saliva," emphasizing its impurity and the constant presence of death at every moment, calling this a great misfortune. This highlights the body's impermanence from childhood through old age.