"Numb is the sound of the inside of somebody's head, with a great lyric and performance by Edge. It is a relentless portrait of what he was feeling at the time and what a lot of people were feeling in the wider world about media. He was in that spot but it became a great metaphor for the media overload generation incapable of feeling anything for the pictures you see."
Although instrumental, the song '4th Of July' was recorded on the 4th of July, it is about how they felt that day. The Edge was playing the guitar, completely unaware that Brian Eno (one of the producers) was recording it.