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.

Without wilderness, the world's a cage.

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.

The trouble with being patient is that eventually you get tired of it.

Lots of people want to ride with you in the limo but what you want is someone who will take the bus with you when the limo breaks down.

Who among us would ask our children for a loan, so we could spend money we do not have on things we do not need?

My early reviews were so bad that I decided I didn't want to read them again.

A lot of things look cooler in slow motion. Eating isn't one of them.

It is not inspiration; it is expiration.

It's just cool to do something different and branch out and dabble in different genres.

Animals can seem more pure. Without complication, I mean, animals are selfless. What animals do for us, they do out of instinct.

My chastity's the jewel of our house, bequeathed down from many ancestors.