Facebook are an amazing team, a brilliant team. It's a technology that brings people together.

The most powerful idea that's entered the world in the last few thousand years - the idea of grace - is the reason I would like to be a Christian.

What I like about pop music, and why I'm still attracted to it, is that in the end it becomes our folk music.

So what we're talking about here is human rights. The right to live like a human. The right to live, period. And what we're facing in Africa is an unprecedented threat to human dignity and equality.

It's quite widespread in rock culture, that mythology of the shooting star. I'd rather be the North star. As bob (Dylan) says, you can navigate by it.

It's much easier to be successful than it is to be relevant. The tricks won't keep you relevant. Tricks might keep you popular for a while, but in all honesty, I don't know how U2 will stay relevant. I know we've got a future. I know we can fill stadiums. And yet with every record, I think, 'Is this it? Are we still relevant?'

As hard as it is, as ghetto as it is, hip-hop is pop music. It's the sound of music getting out of the ghetto, while rock is looking for a ghetto.