Philosophy is at its most engaged when it is impure. What is being recovered from the Ancient Greek model is not some lost idea of philosophy's pure essence, but the idea that philosophy is mixed up with everything else.

Prayer provides an opportunity to remind oneself of how one should be living, our responsibilities to others, our own failings, and our relative good fortune, should we have it. This is, I think, a pretty worthwhile practice and it is not something you can only do if you believe you are talking to an unseen creator.

On social networking sites, we may expose ourselves, but we choose to do so. We are in control and, often wrongly, we do not feel we are giving away tradable data.

There have been a number of philosophers who have reveled in the dismantling of truth. I think they did so with good ethical motives, and for good philosophical reasons. I can see the sense in what they were talking about; the idea that truth is often claimed by elites in order to further certain agendas. They crowd-out alternative perspectives - particularly those of the powerless. But the undermining of truth contributed - in the weird, indirect way that philosophy contributes to the culture - to a rejection of the idea of truth as having any kind of proper meaning at all.

As a teenager, I increasingly had questions about religion to which I found no good answers.

Looking out over the port of Dover, with the endless steam of boats coming in and out, every British citizen is reminded that belonging here has never been about blood or genes. It's simply about being at home on this discrete island and being aware of the privileges and responsibilities that brings.

If we find it hard to believe that winning millions might not be so lucky after all, we just don't have a good enough imagination. If I fantasise about winning the lottery, it doesn't take long before all sorts of worrisome potential consequences occur to me.