In Victor Hugo's "Les Miserables," the protagonist endures numerous hardships, yet he finds a hidden strength that propels him forward. This inner force acts as a source of encouragement, allowing him to rise above his challenges. The notion suggests that the soul possesses a unique ability to invigorate and uplift the physical self, especially during times of struggle.

Hugo metaphorically describes the soul as a bird, symbolizing freedom and resilience. Despite being confined by life's difficulties, the soul enables the individual to endure and thrive, illustrating the profound connection between spiritual and physical well-being. This perspective emphasizes the importance of inner strength in overcoming adversity.