There are several layers of impermanence represented here. In a concrete, physical sense these paintings are impermanent, they have been restored, faded, fixed and so forth and are not the same as they were. Their meaning to Thais and to other viewers is also impermanent as, like any religion or culture, understanding tends to change with the times. Within the story the impermanence of our presence in the physical bodies is highlighted through the dead figure of Rama's wife Sita. However, as this is not really his wife but another being temporarily taking on the form of his wife as a trick it also harkens to the impermanence of our perception of the world. As with many of the tales I was told, the trick is figured out.