Released on The Joshua Tree in 1987, this track stands as a defining moment in U2's evolution from post-punk revival to expansive rock. The song's haunting melody and introspective lyrics explore themes of spiritual searching and existential uncertainty, resonating deeply with the album's narrative of a journey through Ireland and beyond. As a centerpiece of the record, it showcases the band's ability to blend acoustic intimacy with orchestral grandeur, establishing a sonic template that would influence countless artists in the alternative and indie rock genres. Its enduring popularity stems from its universal emotional core, making it a staple in live performances and a cultural touchstone for fans of the era.