Jean Valjean grapples with complex emotions as he observes the happiness of Cosette and Marius, feelings that are intertwined with his own desires and sacrifices. He recognizes that their joy is a result of his own actions and choices, which brings him both pride and pain. Valjean's internal conflict highlights the bittersweet nature of love, sacrifice, and the impact of his past on the present.

In this moment of reflection, he likens his feelings to an armorer identifying their work on a blade, suggesting that even in his suffering, he finds a twisted form of satisfaction. This metaphor encapsulates his struggle; even though he feels wounded by the situation, he takes pride in having played a crucial role in the happiness of those he cares about, showcasing the complexities of human emotions and relationships.