In Victor Hugo's "Les Miserables," the quote reflects the profound connection between happiness, love, and the experience of suffering. It suggests that a person who possesses a soul capable of both love and anguish is truly fortunate, as they have a deeper understanding of life. This duality of joy and pain enriches one's existence and offers insight into the complexities of human emotions.

Furthermore, the quote emphasizes that without comprehending the interplay between happiness and unhappiness, one lacks a complete perspective of the world and humanity. It highlights the importance of recognizing both the light and dark aspects of life to gain true wisdom and appreciation for the human experience.