What does by the fairest of blood it is done and by the fairest of blood it is undone mean from the story snow white and the huntsman?

In "Snow White and the Huntsman," the phrase "by the fairest of blood it is done and by the fairest of blood it is undone" suggests a cyclical relationship between beauty, power, and fate. It implies that the actions taken against Snow White, driven by jealousy and the desire for beauty, ultimately lead to both her downfall and potential resurrection. The "fairest of blood" refers to those of noble lineage or exceptional beauty, emphasizing how these traits can lead to both destruction and redemption. Thus, it underscores the story’s themes of rivalry and the consequences of envy.