Wilderness and motors are incompatible and the former can best be experienced, understood and enjoyed when the machines are left behind where they belong -- on the superhighways and in the parking lots, on the reservoirs and in the marinas.

Civilization, like an airplane in flight, survives only as it keeps going forward.

In marriage, the occasional catastrophic crisis is easier to manage than the daily routine.

Every man has two vocations: his own and philosophy.

Come with me, the river said, close your eyes and quiet your limbs and float with me into the wonder and mystery of the canyons, see the unknown and the little known, look upon the stone gods face to face, see Medusa, drink my waters, hear my song, feel my power, come along and drift with me toward the distant, ultimate and legendary sea.

Men come and go, cities rise and fall, whole civilizations appear and disappear-the earth remains, slightly modified. The earth remains, and the heartbreaking beauty where there are no hearts to break....I sometimes choose to think, no doubt perversely, that man is a dream, thought an illusion, and only rock is real. Rock and sun.

You can't study the darkness by flooding it with light.