One

Harry Nilsson's song 'One' delves deep into the theme of loneliness, using the number 'one' as a powerful metaphor for the feeling of isolation. The lyrics repeatedly emphasize that 'one is the loneliest number,' suggesting that being alone is the most profound form of loneliness. This idea is contrasted with the notion that 'two can be as bad as one,' indicating that being in a relationship or partnership that is not fulfilling can also feel incredibly isolating. The song captures the essence of solitude not just as a physical state but as an emotional and psychological experience.

The song also touches on the sadness of rejection and separation, as seen in the lines 'No is the saddest experience you'll ever know.' This could be interpreted as the pain of being turned down or left by someone, which amplifies the feeling of loneliness. The repetition of 'one' throughout the song serves to reinforce the overwhelming sense of being alone, making it a poignant reminder of the emotional impact of solitude.

Musically, Nilsson's soft, melancholic tone complements the theme of the song, enhancing the overall mood of sadness and introspection. The simplicity of the arrangement allows the lyrics to stand out, making the message more impactful. The song's enduring popularity may be attributed to its universal theme, as it resonates with anyone who has ever felt lonely or isolated.