“When viewed at the next quantum level of perspective, from which the Earth is seen as an organism and humans are seen as microorganisms, the human species looks like a menace to the planet. In fact, the human race is looking a lot like a disease -- comprised of organisms excessively multiplying, mindlessly consuming, and generating waste with little regard for the health and well-being of its host -- planet Earth.”

“A new consciousness is developing which sees the earth as a single organism and recognizes that an organism at war with itself is doomed. We are one planet. One of the great revelations of the age of space exploration is the image of the earth finite and lonely, somehow vulnerable, bearing the entire human species through the oceans of space and time.”

“In the Gaia theory air, water, and soil are major components of one central organism, planet Earth. What we typically think of as life - the plants and animals that inhabit the earth - has evolved merely to regulate the chemistry of the biosphere. Humans are insignificant participants, far less important to the life cycle than termites. Even the imbalance that we have created by adding massive quantities of carbon dioxide to the atmosphere may be brought back to acceptable levels by other organisms functioning in their capacity to correct excesses.”

“Environmentalists and secular humanists insist that humans will destroy the planet. Corporate capitalists and many religious fundamentalists have no regard for wildlife and nature. Ultimately, this dualistic battle is based on false premises. In fact, this planet is more powerful than the human species.”

“The Doctor: The Fourth Great and Bountiful Human Empire. And there it is: planet Earth at its height. Covered with megacities, five moons, population 96 billion. The hub of a galactic domain, stretching across a million planets, a million species. With mankind right in the middle.[Adam faints]The Doctor: [leans towards Rose, still looking out over the Earth] He's your boyfriend.”

“Don't look at Jaques as if he was a human being, he comes from another planet.”