How does Fatima Mernissi use imagery in Dreams of Trespass: Tales of a Harem Girlhood?

Example of Imagery:

"The frontier indicates the line of power because wherever there is a frontier, there are two kinds of creatures walking on Allah's earth, the powerful on one side, and the powerless on the other. I asked Mina how would I know on which side I stood, and her answer was quick, short and very clear: 'If you can't get out, you are on the powerless side'"