How does Jamaica Kincaid use imagery in Lucy?

Imagery:

"It was at dinner one night not long after I began to live with them that they began to call me that Visitor. They said I seemed not to be a part of things, as if I didn't live in their house with them, as if they weren't like a family to me, as if I were just passing through ..."

"'Mariah, do you realize that at ten years of age I had to learn by heart a long poem about some flowers I would not see in real life until I was nineteen?'"