"We decided on instinct almost, that it was the right image for the record, but the intellectual reasons I haven't quite sorted out in my own mind. It has a spiritual aspect which this record has, and also a great deal of mystery which I like."
- The Edge on cover image for The Joshua Tree
Many musicians have been influenced by the work of U2. There are several cover versions of U2 songs by bands such as Pet Shop Boys, Pearl Jam and The Chimes, and musicians such as Cassandra Wilson, Joe Cocker and Johnny Cash.