There is no reason at all to think that creatures with very different purposes and concerns would arrive at the scientific image, and no reason at all to accuse such creatures of getting the world wrong - a point that both Chuang Tzu and Nietzsche make when comparing human and animal perspectives.

Like Nietzsche's own writings on education, most of mine were relatively youthful ones. Both were inspired by a critical animus against prevailing trends in education: in Nietzsche's case, the production either of 'useless', dry-as-dust scholars or people 'useful' for the needs of an expanding industrial economy; in my case, a similar subjection of education to economic imperatives, but also to ideological obsessions, notably with promoting 'equality'.

While I am happy to make the occasional foray into educational philosophy - writing, for example, of the difficulty in the contemporary context for a teacher to be 'truthful' - it is more the personal conduct of a life than social institutions that I am concerned to examine.

To recognize that you are radically free, in Sartre's sense, but then to live as if you weren't, is to live in bad faith, in denial of what you know to be true. And that's not something anyone can sensibly want to do.

Chuang Tzu and Heidegger both emphasise the virtue of 'spontaneity' - a sort of mindful responsiveness to things as they are. It's this notion, I suspect, that is the best bet for helping to make some sense of talk about harmony or unity with nature.

In the doctrine of the world and humankind as 'will to power and nothing else', Heidegger identified not an antidote to nihilism, but the completion of it. For what can be more destructive of truth and value than the doctrine that these are simply the impositions on the world of human exercises of power?

For me, the existentialists are important critics of 'absolutist' claims, and Heidegger and Merleau-Ponty are, at least in their later writings, also exponents of a doctrine of mystery: Being or the 'well-spring' of everything is, for Heidegger, ineffable, just as what Merleau-Ponty called 'Flesh' is for him.