In Margaret Atwood's "The Handmaid's Tale," the quote highlights the intrinsic relationship between opposing forces, suggesting that the existence of one necessitates the presence of the other. The idea that light and shadow coexist reflects the complex nature of resistance and oppression in the narrative. The light symbolizes hope and strength while the shadow represents despair and submission. Together, they create the foundation of the protagonist's struggle against a totalitarian regime.

This duality emphasizes the importance of resistance in the fight for freedom. The belief that resistance can lead to the emergence of light mirrors the characters' journey as they navigate through their dark surroundings. Atwood’s message serves as a reminder that even in the bleakest situations, the fight for liberation and justice can illuminate the way forward, revealing the potential for change and renewal.