In Victor Hugo's "Les Miserables," the author explores the theme of light as a symbol of health and purity. The quote "Light renders healthy" suggests that light has a restorative and revitalizing quality that benefits both the body and soul. This metaphor highlights the importance of hope and goodness in life, implying that just as physical light nurtures life, spiritual and moral enlightenment fosters personal well-being.

The context of the quote underlines the novel's focus on redemption and transformation. Characters often seek light in their darkest moments, representing their journey towards healing and renewal. Hugo's use of light serves as a powerful reminder of the potential for recovery and growth amid adversity, resonating with the overarching themes of love, compassion, and the struggle for a better existence.