"A few days after the album [Songs of Innocence] was finished, I thought Iris shouldn't be part of the album. Even though the song is a beautiful tune and everything, I just thought it was going a bit far and it's not very punk rock, singing about your mother."
did you know
According to an interview from 1982 the song 'October' is about the Bolsheviek revolution in Russia in 1917, that brought Communism to power. This theme is mixed with a personal theme, possibly Bono's mothers death.