Meaning of "Don't Be Light (Edit)" by Air

The repetition of "Don't be light" in the lyrics can be interpreted as a warning against being superficial or lacking depth. The singer seems to be cautioning against the tendency to not take things seriously or to be overly carefree. The plea for others to not be like them in this aspect suggests a sense of self-awareness and a desire for others to possibly learn from their own mistakes or regrets. The lyrics may be a reflection on the importance of substance and meaning in a world that often prioritizes surface-level appearances and instant gratification. Overall, the song conveys a message of depth and authenticity over shallowness and superficiality.