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 am opposing it with an idea of the history of philosophy as a history of philosophers, that is, a history of mortal, fragile and limited creatures like you and I. I am against the idea of clean, clearly distinct epochs in the history of philosophy or indeed in anything else. I think that history is always messy, contingent, plural and material. I am against the constant revenge of idealism in how we think about history.

I think that when people are at their best, when they are thinking, reflecting, cogitating, then they are doing philosophy. So I don't see philosophy as an academic enterprise.

Christianity in the West, opens up a perspective of depth into what it means to be a self. And that depth of the self is something that is experienced in the sight of God. So that the great thinkers of self and subjectivity are Paul and Augustine. They look at the self from the perspective of God and they find themselves wretched and interesting. Constituted by conflictual desires.

Poetry is difficult, I mean interesting poetry, not confessional babble or emotive propaganda. Reading a new poet is discovering an entire world, what Stevens called a 'mundo' and it takes a lot of time to orientate oneself in such a world. What we have to learn to do then, as teachers and militants of a poetic insurgency, is to encourage people to learn to love the difficulty of poetry. I simply do not understand much of the poetry that I love.

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.

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?