How does Langston Hughes use imagery in The Blues I'm Playing?

Mrs. Ellsworth's high-minded, abstract ideas about art as transcendent are expressed through imagery of the stars in the sky, which rise above the earth. "You could shake the stars with your music," she tells Oceola. She also goes on to describe Oceola's marriage through imagery which descends to the level of dirt and death. She describes Oceola's decision to marry Pete as "digging a grave for yourself."