It's important to have quiet time and isolation.

Anyone who has ever stopped to watch a hawk in flight will know that this is one of the natural world's most elegant phenomena.

What the flamingo teaches a child, at that subliminal level where animal encounters work, is that gravity is not just a limitation, but also a possible partner in an intriguing, potentially joyful game.

Snow isn't just pretty. It also cleanses our world and our senses, not just of the soot and grime of a Fife mining town but also of a kind of weary familiarity, a taken-for-granted quality to which our eyes are all too susceptible.

High Alpine meadows, like their near relatives prairie, desert and certain varieties of wetland, teach us to consider the world from a fresh perspective, to open our eyes and take account of what we have missed, reminding us that, in spite of our emphasis on the visual in everyday speech, we see so very little of the world.

There is a red sandy beach in the Minas Basin in Nova Scotia that is unlike any other shore landscape I have ever seen. The world's highest tides wash its shores, and the soft cliffs of Blomidon Provincial Park are constantly crumbling away; whole trees will occasionally slide down to the sea to decay slowly in the wind and brine.

In many traditions, hawks are sacred: Apollo's messengers for the Greeks, sun symbols for the ancient Egyptians and, in the case of the Lakota Sioux, embodiments of clear vision, speed and single-minded dedication.

This is a truth that should be repeated like a mantra: to have any chance of a ful - filling life, we require not only clean air and a steady climate, but also an abundance of meadows and woodlands, rivers and oceans, teeming with life and the mass existence of other living creatures.

If nature offers no home, then we must make a home one way or another. The only question is how.