The thing about humour is that the super-ego is also at play, so what interested me, particularly in the last chapter which is key to the book -and no one seems to have picked this up in writings on Freud - is that, in the later Freud, the essence of humour is the ability to look at myself and find myself ridiculous. That makes me laugh.

I've always been very keen on Pascal, and what I'm most keen on in Pascal is his emphasis upon human wretchedness. He has a phrase which goes something like 'Anxiety, boredom and inconstancy, that is the human condition' and I've always been very partial to that.

Being anthropologically respectful of all faiths means being committed to none, and being left to drift without an anchor for one's most deeply held beliefs. To have such an anchor means being committed to a specific community. The only way Obama can overcome his sense of detachment and resolve his mother's dilemma is through a commitment to Christianity.

For me philosophy begins with these experiences of disappointment: a disappointment at the level of what I would think of as "meaning," namely that, given that there is no God, what is the meaning of life? And, given that we live in an unjust world, how are we to bring about justice?

When the animal becomes human, the effect is pleasingly benign and we laugh outloud, "Okay come clean now. This isn't really about hunting, is it?" But when the human becomes animal, the effect is disgusting, and if we laugh at all, then it is what Beckett calls the "mirthless laugh", which laughs at that which is unhappy.

There is something desperately lonely about Barack Obama's universe. One gets the overwhelming sense of someone yearning for connection, for something that binds human beings together, for community and commonality, for what he repeatedly calls "the common good". This is hardly news.

I have argued that philosophy doesn't begin in wonder or in the fact that things are, it begins in a realization that things are not what they might be. It begins with a sense of a lack, of something missing, and that provokes a series of questions.