Without wilderness, the world's a cage.

The more we pour the big machines, the fuel, the pesticides, the herbicides, the fertilizer and chemicals into farming, the more we knock out the mechanism that made it all work in the first place.

All technology should be assumed guilty until proven innocent

Overpopulation is perhaps the biggest problem facing us, and immigration is part of that problem. It has to be addressed.

Truth and beauty can still win battles. We need more art, more passion, more wit in defense of the Earth.

Sometimes luck is with you, and sometimes not, but the important thing is to take the dare. Those who climb mountains or raft rivers understand this.

Understanding how DNA transmits all it knows about cancer, physics, dreaming and love will keep man searching for some time.

We are no longer inheriting the Earth from our parents, we are stealing it from our children.

Apollo 13, as you may remember, gave us a reactor that is bubbling away right now somewhere in the Pacific. It's supposed to be bubbling away on the moon, but it's in the Pacific Ocean instead.

Bring diversity back to agriculture. That's what made it work in the first place.

Let the mountains talk, let the river run. Once more, and forever.

Living beings have this in common

I play to win and if it looks like I've lost, its only because its not over yet.

She will always be the rainbow in my clouds.

I don't like to sugarcoat, it can cause an addiction to B.S.

I hate when someone drives my car and resets all the radio presets. I don't understand it. If I was ever driving someone's car, I would never touch the things that were set.

You ask me for a motto. Here it is: SERVICE.

The ideal place for me is the one in which it is most natural to live as a foreigner.

A good rule of conversation is never answer a foolish question.

Libraries: Here is where people, one frequently finds, lower their voices, and raise their minds.

I am, as it were, an eye that the cosmos uses to look at itself. The Mind is not mine alone; the Mind is everywhere.