It is indeed impossible to describe reality 'in itself', but that does not mean that our lives are answerable to nothing but our own conventions and commitments. They are answerable to a way of things that transcends the reach of our conceptual schemes.

I'm very sceptical about the prospects for 'big' environmental causes - 'saving the planet', halving the world's population, ending the exploitation of animals, and so on - but a person can ask him- or herself how he or she personally may exercise compassion or humility towards animals, vegetal life and so on.

I started my professional life as a philosopher of language and for several years took the orthodox line that meaning is an essentially linguistic phenomenon. Whether as a result of simply listening to everyday talk about meaning, or reading books of anthropology, sociology and art history, it dawned on me that there is nothing at all privileged or central about linguistic meaning.

The demands of the economy, and more recently those of political correctness and the diktat against ever offending anyone, are not conducive to a classroom or university seminar climate in which genuinely free and critical reflection on how to live prospers.

How people make gardens is bound to reflect a way of experiencing the natural world, while at the same time this experience of nature is bound to reflect a culture - ways of painting nature, for example, or representing nature in literature, or of course making gardens.

I think it's true that for existentialist thinkers, appreciation of what we are - free, makers of meaning, 'issues' for ourselves, and so on - is at the same time a recognition of how we should try to live.

There is something myopic and stunted in focussing only on the meaning of words and sentences. And this myopia is especially unfortunate when combined with a rather abstract view of a language as a set of elements and rules for combining these. For the result is to divorce enquiry into meaning from attention to the way words - and gestures, facial expressions, rituals and so on - are embedded in practices, in what Wittgenstein called 'the stream of life'.