Music is one of my big interests - I once had a rather fanciful ambition to be a singer - and of course music is philosophically fascinating. What it is for music to express emotion strikes me as one of the most difficult questions - it's hard to say what it precisely means, although it plainly does mean something. But whenever I have tried to say something about this, it has come out as either banal or pretentious or both.

I think we atheists should tolerate the religious not because their views are just as valid as ours, but because experience has shown that we are unlikely to convert them, and so we have to find some way to live in peace with them, even if we find their views false or otherwise objectionable.

I had abandoned Catholicism, but even during my short militant atheist period I maintained an interest in western religious art and music.

I do think that philosophy and science are very different intellectual enterprises, but that does not mean that when we get knowledge from philosophy it is a different kind of knowledge.

Would it be better if religions were to disappear? I have no idea. Since I do not have any confidence in the association of truth with virtue, I am not sure if the world would be a better place if people believed more true things. But what is undeniable is that we cannot understand our own culture unless we recognise that it was formed, for good or bad, as a Christian culture. It's an illusion that we could somehow recover a human essence which is independent of the way it was created by culture.

I do not claim to have any developed or sophisticated views in political philosophy, but I think that one of the lessons of the last few hundred years of history is that the greatest threat to human prosperity and well-being is fanaticism and intolerance, even in the name of apparently laudable goals.

Science will always raise philosophical questions like, is any scientific theory or model correct? How do we know? Are unobserved things real? etc. and it seems to me of great importance that these questions are not just left to scientists, but that there are thinkers who make it their business to think as clearly and slowly about these questions as it is possible to. Great scientists do not always make the best philosophers.