Mechanized recreation already has seized nine-tenths of the woods and mountains; a decent respect for minorities should dedicate the other tenth to wilderness.

Too much safety seems to yield only danger in the long run.

The hope of the future lies not in curbing the influence of human occupancy - it is already too late for that - but in creating a better understanding of the extent of that influence and a new ethic for its governance.

It is in midwinter that I sometimes glean from my pines... a curious transfusion of courage.

The first law of intelligent tinkering is to save all the parts

Examine each question in terms of what is ethically and aesthetically right, as well as what is economically expedient.

The last word in ignorance is the man who says of an animal or plant: 'What good is it?