Philosophy, for me, is a way of relearning to look at the world, a world that is familiar to us, that we know, that is shared by all human beings and also by nonhuman beings.

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.

If I had a religious experience, what I know for sure is that I would stop doing philosophy and would start doing religion, teaching classes in religion, preaching in a local church. That is fine and noble activity. But I do not feel entitled to engage in it. So for me philosophy is my fate.

In the US, what passes for Christianity - and it is, to say the least, a highly perverse, possessive individualist and capitalist version of what I would see as Christ's messianic ethical communism, to say the least - is a new civil religion, a civil religion of freedom.

The culture of irony is the culture of postmodernism, which I would furiously want to denounce. We have to act ethically and politically. Irony is a defensive position, against reality. It always knows what to think about reality. The idea of commitment and engagement is central to me, which is not ironic.

Just to say "Well, God is dead" in one breath is to say, in another, that nothing means anything. This is the moment of nihilism. Nihilism is the affirmation of meaninglessness.

We must believe, but we can't believe. Perhaps this is the tragedy that some of us see in Obama: a change we can believe in and the crushing realisation that nothing will change.