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

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.

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.

Man tames not vengeance

Don't fight to be right, but fight when you are right.

What the culture of get rich quick does to our people is People want to get something for nothing.

Never get tired of being your true original self. You are too special to be anything other than a reflection of your true identity.

Here is a paradox: People who think imperfect are closer to perfection than their counterparts who claim that they're perfect or closer...

Sometimes attaining the deepest familiarity with a question is our best substitute for actually having the answer.

An agnostic is a doubter. The word is generally applied to those who doubt the verity of accepted religious creeds of faiths.

I'm terrified of performing live.

(3) 'IS IT A SYSTEM...?' ... Ultimately, I suspect, this is a question about which the reader should form his own judgement by study of the original text.

Ma’at demands a leader.” “Yeah so I’ve heard.