The chorus was inspired by U2's first concert in New York City following the September 11 attacks during their 2001 Elevation Tour. When the lights illuminated the audience during a performance of "Where the Streets Have No Name," the band saw tears streaming down the faces of many fans. Upon seeing this raw release of emotion, Bono shouted, "Oh you look so beautiful tonight"; later, the band integrated the line into the chorus. The fans' passion, along with the resolve of the city following the attack, were the primary inspirations for many of the song's other lyrics.