In Victor Hugo's "Les Miserables," the quote compares the flickering light of a torch to the wisdom of those who display cowardice. The image of a trembling flame symbolizes instability and lack of depth, suggesting that such wisdom is unreliable and insufficient, much like the light it casts. This metaphor highlights how fear can distort one's understanding and diminish clarity in thought.

Hugo's insight serves as a critique of those who rely on superficial knowledge or insights, illustrating how fear can undermine true wisdom. A steady flame, representing courage and deeper understanding, would illuminate the darkness more effectively. The quote encourages readers to seek a more profound and stable wisdom that stands firm amidst challenges, rather than a wavering understanding that comes from fear.