Bad Side Of The Moon by Elton John discusses the struggles and hardships one faces when things do not go as planned or when life takes a difficult turn. The song uses the metaphor of the 'bad side of the moon' to represent the darker, tougher times in life. Key themes include isolation, frustration, and the feeling of being misunderstood. Poignant moments in the song include lyrics that speak to the sense of disappointment and the recognition that not every moment can be bright and hopeful, reflecting a deep sense of realism about life's ups and downs.