In Victor Hugo's "Les Miserables," the quote "Every skull-cap may dream of the tiara" reflects the aspirations and ambitions of individuals, regardless of their social status. It suggests that even those who seem humble or insignificant, represented by the skull-cap, can harbor dreams of grandeur and nobility, symbolized by the tiara. This embodies a central theme of the novel, which explores the social hierarchies and the desire for a better life.

This juxtaposition of the skull-cap and the tiara highlights the universal nature of dreams and the human spirit's innate desire for improvement and recognition. Hugo masterfully illustrates how these aspirations can propel characters to seek change in their lives, fostering hope and resilience against societal constraints. The idea serves as a poignant reminder of the potential within every individual, regardless of their beginnings.