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

I have a general moral: great philosophers may be great, but that is not a reason to follow them. Don't be a follower. Work it out for yourself.

I do think it's important to distinguish between intentionalism about consciousness and externalism about consciousness. Intentionalism says that consciousness is a form of intentionality - the representation of things to the mind. Externalism says that these things have to exist in order for them to be represented, or presented. These are different views.

Taken as hypotheses, religious claims do very badly. Yet the striking fact is that this does not worry Christians.

The thing I think I have learned from Wittgenstein is the importance of not making things up: philosophers should not invent problems, and they should also be conscious of the risk of inventing pointless 'technical' machinery which do not offer real explanations, but often just re-state the known facts in a more complex way.

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.

Problems come and go over time, and to understand why is a difficult historical task. If one wanted to find the origin of a problem, historical research and close attention to texts is what is needed, not unconstrained speculation about the 'pictures' that philosophers must be in the grip of.