The scenes described in Stanzas 2 and 4 differ from real life because: the urn could be broken and lose its art
the art gives the scenes a life that would fade and die in real life
in real life, the maid would grow old and someday die
in real life, the characters would complete their actions
they are "frozen" unchanging
in real life, the scenes would remain sylvan and ideal
the actions will be completed in another work of art

She took up a scalpel and slit the monkey's abdomen, making a slow and gentle cut, keeping the blade well away from her gloved fingers. the spleen was puffed up and tough, leathery, like a globe of smoked salami. she did not see any bloody lesions inside this monkey. she had expected that the monkey's interior would be a lake of blood, but no, this monkey looked all right, it had not bled into itself. if the animal had died of ebola, this was not a clear case. she opened up the intestine. there was no blood inside it. the gut looked okay. then she examined the stomach. there she found a ring of bleeding spots at the junction between the stomach and the small intestine. this could be a sign of ebola, but it was not a clear sign. it could also be a sign of simian fever, not ebola. therefore, she could not confirm the presence of ebola virus in this animal based on a visual inspection of the internal organs during necropsy.