"As human beings, we are part of the whole stream of life. We have been human beings for perhaps a million years. But life itself — passes on something of itself to other life — that mysterious entity that moves and is aware of itself and its surroundings, and so is distinguished from rocks or senseless clay — [from which] life arose many hundreds of millions of years ago. Since then it has developed, struggled, adapted itself to its surroundings, evolved an infinite number of forms. But its living protoplasm is built of the same elements as air, water, and rock. To these the mysterious spark of life was added. Our origins are of the earth. And so there is in us a deeply seated response to the natural universe, which is part of our humanity."
- Rachel Carson (1907 - 1964)