In Victor Hugo's "Les Miserables," the quote highlights the intense complexity of human nature, illustrating how goodness and evil can coexist within a single individual. The 'poignant and terrible' face represents a deep struggle, where even those considered good can harbor darkness. This duality raises questions about morality and the essence of humanity.

The phrase paints a vivid image of the emotional turmoil present in characters like Jean Valjean and Javert, showcasing their internal battles. Hugo suggests that such contradictions are inherent to the human experience, making us reflect on our own moral choices and the capacity for both light and darkness within us.