How are the concepts of impermanence and detachment demonstrated in Bernardo Bertolucci's film Little Buddha?

The story told by Lama Norbu at the beginning of the movie
about an ancient Indian priest who wants to sacrifice a goat to the gods is a good
introduction to the concept of impermanence and its inevitability. As the priest rises
his knife and is ready to cut the goat's throat, the animal starts to laugh because
after 499 times of dying and being born again as a goat, the animal will this time be
reborn as a human being. Then  the goat starts crying explaining the 500 lives ago it
too was a high priest sacrificing goats. The story exemplifies the migration of
the spirit and its detachment from the body. In a later scene Norbu explains
re-incarnation by breaking a cup full of tea and explaining that, although the cup (the
body) does not exist any longer, the tea (the mind) remains despite taking different
forms.