In Cormac McCarthy's novel "The Road," the phrase "You have to carry the fire" symbolizes hope and perseverance amidst despair. It reflects the struggle for survival in a post-apocalyptic world where humanity and morality are at risk of being extinguished. The fire represents not just physical warmth but also the inner strength and spirit necessary to navigate through the darkness of human existence.

The characters, particularly a father and his son, embody this idea as they journey through a desolate landscape. Their commitment to carrying the fire illustrates the importance of nurturing love, compassion, and the will to live, even when faced with overwhelming challenges. This enduring flame becomes a powerful metaphor for sustaining one’s humanity in the face of adversity.