Nature does not complete things. She is chaotic. Man must finish, and he does so by making a garden and building a wall.

We are certainly not to relinquish the evidence of experiments for the sake of dreams and vain fictions of our own devising; nor are we to recede from the analogy of Nature, which is wont to be simple and always consonant to itself.

A forest is not solely so many thousand board feet of lumber to be logged when market conditions make it profitable. It is an integral part of our natural land covering, and the most potent factor in maintaining Nature's delicate balance in the organic and inorganic worlds.

The body of the earth is of the nature of a fish, a grampus or sperm whale, because it draws water as its breath instead of air.

I see an America whose rivers and valleys and lakes hills and streams and plains the mountains over our land and nature's wealth deep under the earth are protected as the rightful heritage of all the people.

I abhor the supreme folly of those who blame the disciples of nature in defiance of those masters who were themselves her pupils.