In Victor Hugo's "Les Miserables," the author emphasizes the importance of nurturing the young soul, particularly that of a girl. He warns that if such a soul is neglected or left in darkness, it can lead to distorted perceptions and fantasies. This neglect can cause sudden, chaotic images to overpower the mind, similar to what occurs in a darkened room where the imagination runs wild.

Hugo's insight reveals the vital role of guidance and support in a young person's life. A healthy emotional and mental environment is essential for balanced development. Without this, young individuals may struggle with unrealistic expectations and fears, which can manifest later in life. The quote underscores the need for love and light to foster a positive and grounded perspective in youth.