In U2's 'I Still Haven't Found What I'm Looking For,' A Restless Search For Meaning

U2's "I Still Haven't Found What I'm Looking For" was released in 1987 on The Joshua Tree, an album inspired by the band's experience of America, both as a real place and as a mythic idea. U2's lead singer and songwriter, Bono, has referred to it as "a gospel song with a restless spirit." To understand where that restless spirit came from, it helps to know the depth of the band's religious roots.