"It's about the experience of looking rather than touching. I think my favourite image is the image of glass, where he melts the sand so he can see the world outside." - Bono on "Lemon"
did you know
The song Heartland is about a trip Bono and Adam made after the Joshua Tree tour through America by car, they passed many placed and states and Heartland contains phrases of Bono's journey of that trip.