"So where does all music come from -- be it hip-hop or rock 'n' roll? I don't know. But I do know that all music is praise. It's praise to the god of your making. Which, in the case of a rock star, might be oneself. Or a woman. Or an idea."
- Bono, 2004
U2 had planned to release the material for No Line On The Horizon as two extended plays, titled Daylight and Darkness, but during sessions in London in 2008 decided to compile the best songs onto one album.