Sad Lisa by Cat Stevens is a poignant ballad that delves into themes of sadness, loneliness, and the yearning for emotional connection. The song is about a girl named Lisa who is deeply troubled and feeling isolated in her sadness. The narrator wants to help her but feels helpless in the face of her overwhelming sorrow. Key themes include empathy, emotional struggle, and the desire to provide comfort to someone in distress. Particularly poignant moments in the song include the lines where Lisa cries and the narrator’s attempts to soothe her, highlighting a deep sense of compassion and the human need for understanding and support.