Bono has never considered going solo, because without his U2 bandmates he's just a "lousy musician".
The Irish rocker insists he relies on bandmates Edge, Adam Clayton and Larry Mullen to help him make good music - and suppress his inner rage.
He explains: "There's a rage in me that I have to rely on others. I'm very good at relying on others.
"I'm a lousy guitar player and an even lousier piano player. Had I not had Edge close by, I would be hopeless.
"Had I not got Larry and Adam, those melodies in my head would not be grounded. But it's still very difficult for me to have to rely on others. The blessing of weakness is it forces you into friendships. The things you lack, you look for in others, but there are times you become angry. You think: if only I could get to this place."