We don't know nearly enough about the complexities of Nature. If we think we can eliminate natural ecosystems and substitute prosthetic devices, i.e. clean air or water with fusion energy - we are kidding ourselves.

The great challenge of the twenty-first century is to raise people everywhere to a decent standard of living while preserving as much of the rest of life as possible.

The human juggernaut is permanently eroding Earth's ancient biosphere.

It's the technique, I think, of writing a novel that is difficult for a nonfiction writer.

Every kid has a bug period... I never grew out of mine.

And pigs may fly. And we may be able to terraform and send surface populations to Mars. And Jesus may come next week anyway, so it doesn't matter one way or the other. All these crazy things run through people's minds.

For me, the peculiar qualities of faith are a logical outcome of this level of biological organization.