Perhaps the central question about [Eliot] Porter's work is about the relationship between science, aesthetics, and environmental politics. His brother, the painter and critic Fairfield Porter, wrote in a 1960 review of [Porter's] colour photographs: 'There is no subject and background, every corner is alive,' and this suggests what an ecological aesthetic might look like.

Walking articulates both physical and mental freedom.

Previous technologies have expanded communication. But the last round may be contracting it. The eloquence of letters has turned into the unnuanced spareness of texts; the intimacy of phone conversations has turned into the missed signals of mobile phone chat ... ('you're breaking up' is the cry of our time).

Books are solitudes in which we meet.

To hope is to give yourself to the future - and that commitment to the future is what makes the present inhabitable.

Credibility is a basic survival tool.

The desire to go home that is a desire to be whole, to know where you are, to be the point of intersection of all the lines drawn through all the stars, to be the constellation-maker and the center of the world, that center called love. To awaken from sleep, to rest from awakening, to tame the animal, to let the soul go wild, to shelter in darkness and blaze with light, to cease to speak and be perfectly understood.