We still talk in terms of conquest. We still haven't become mature enough to think of ourselves as only a tiny part of a vast and incredible universe. Man's attitude toward nature is today critically important simply because we have now acquired a fateful power to alter and destroy nature. But man is a part of nature, and his war against nature is inevitably a war against himself.

There is something infinitely healing in the repeated refrains of nature.

We cannot have peace among men whose hearts find delight in killing any living creature.

Every mystery solved brings us to the threshold of a greater one.

Only within the moment of time represented by the present century has one species -- man -- acquired significant power to alter the nature of the world.

Science is part of the reality of living; it is the what, the how, and the why of everything in our experience.

Those who contemplate the beauty of the earth find reserves of strength that will endure as long as life lasts. There is something infinitely healing in the repeated refrains of nature -- the assurance that dawn comes after night, and spring after winter.