In "Les Miserables," Victor Hugo portrays a powerful and haunting idea that hatred is a universal force that lies beneath all human existence. This cavern of hatred serves as a metaphor for the animosity that exists deep within individuals, suggesting that it can overshadow all aspects of life. The quote emphasizes that this negative emotion is a fundamental adversary, affecting everyone without exception, illustrating its pervasive nature.

The notion that hatred is an enemy to all highlights the destructive consequences it can have on society and personal relationships. Hugo seems to urge readers to recognize the deep-seated issues stemming from this emotion, advocating for empathy and understanding instead. By acknowledging the cavern of hatred, he invites us to confront and overcome it in order to foster a more compassionate world.