"The Earth is not a big rock, infested with living organisms, any more than your skeleton is bones infested with cells.
The Earth is geological, yes, but this geological entity grows people. And our existence on the Earth is a symptom of the solar system and its balances as much as the solar system in turn is a symptom of our galaxy and our galaxy in its turn is a symptom of the whole company of galaxies; goodness only know what that’s in."
"We are the inheritors of millions and millions of years of successfully lived lives and successful adaptations to changing conditions in the natural world. Now the challenge passes to us, the living, that the yet to be born may have a place to put their feet and a sky to walk under."