Maya Angelou's quote describes a metaphorical image of being inside grand, white castles surrounded by a dangerous, poisoned moat. This could symbolize feelings of isolation, protection, or separation from the outside world, suggesting that the speaker's environment is both splendid and potentially hazardous.

The imagery evokes a sense of being enclosed within something beautiful but also guarded or trapped, hinting at the complexities of personal space, safety, and emotional boundaries. It reflects the idea that appearances can be deceiving, with outer grandeur masking inner danger or vulnerability.