The great music for so many artists - the Beatles, the Rolling Stones - was always at the moment when they were closest to pop. It would be easy for U2 to go off and have a concept album, but I want us to stay in the pop fray.

I'm home a lot. Because I live in Ireland, we can live under the celebrity radar. I might go missing for a whole year.

There is a root arrogance in any writer; a hugely arrogant assumption that anyone is going to listen to them.

God is in the slums, in the cardboard boxes where the poor play house. God is in the silence of a mother who has infected her child with a virus that will end both their lives. God is in the cries heard under the rubble of war. God is in the debris of wasted opportunity and lives, and God is with us if we are with them.

When those people get up at the Grammys and say, "I thank God", I always imagine God going, "Oh, don't, please don't thank me for that one. Please, oh, that's an awful one! Don't thank me for that - that's a piece of crap !"

The job of art is to chase ugliness away.

You see, Africa makes a fool of our idea of justice. It makes a farce of our idea of equality. It mocks our pieties. It doubts our concern. It questions our commitment. Because there is no way we can look at what's happening in Africa, and if we're honest, conclude that it would ever be allowed to happen anywhere else.