This passage beautifully captures a transformation that is both physical and emotional. The journey from innocence to experience is a universal theme explored in countless stories, and it resonates deeply here. The initial image of a girl described as 'impossibly lovely' reflects an untainted, pure kind of beauty—one rooted in surface appearances and superficial charm. However, as she enters her room and leaves, there is an evident shift, revealing a deeper, more complex personality beneath the exterior. The description of her being 'thinner' signifies the emotional or psychological toll she has endured, hinting at struggles or hardships she has faced. Her increased wisdom and sadness imply that her experiences have matured her, bringing with them a nuanced understanding of pain that she now comprehends intimately. The phrase 'ocean sadder' evokes a profound depth of sorrow—vast, immense, and overwhelming. It's a vivid metaphor for the weight of suffering that alters one's outlook on life and self-perception. Beneath her outward beauty lies 'character' and 'knowledge of suffering,' emphasizing that genuine strength and resilience often emerge from hardship. We are reminded that true beauty encompasses more than appearance; it is forged through life's trials, shaping the individual into someone with depth, understanding, and inner strength. This evolution reflects the universal truth that suffering, while painful, can lead to personal growth and a richer appreciation for life.