Minervа аpprоаches Arachne disguised as "an оld wоman / Panting and leaning on a stick" and advises her: "Give to mortals / The tapestries that make you / Famous and foremost among mortal weavers, / But give to the goddess / Your gratitude for the gift." What does Minerva's choice of disguise most significantly reveal about how divine power operates in this myth?