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 think carrying moral baggage is very dangerous for an artist. If you have a duty, it's to be true and not cover up the cracks.

I have been working for Africans since I was 18, when I got involved with the Nelson Mandela concerts. I got involved with debt cancellation because Desmond Tutu demanded that the world respond to that situation.

The fact is that ours is the first generation that can look disease and extreme poverty in the eye, look across the ocean to Africa, and say this, and mean it. We do not have to stand for this. A whole continent written off - we do not have to stand for this.

When people say, you know, 'Good teacher,' 'Prophet,' 'Really nice guy'... this is not how Jesus thought of Himself. So you're left with a challenge in that, which is either Jesus was who he said he was or a complete and utter nut case. You have to make a choice on that.

The extraction of oil, coal and minerals brought, and still brings, a cost to the environment.

The human heart is greedy; it will use religion, color, or any other excuse to justify its greed. Blame the human heart.