There is no energy crisis, only a crisis of ignorance.

If man chooses oblivion, he can go right on leaving his fate to his political leaders. If he chooses Utopia, he must initiate an enormous education program - immediately, if not sooner.

I call intuition cosmic fishing. You feel a nibble, then you've got to hook the fish.

If humanity does not opt for integrity we are through completely. It is absolutely touch and go. Each one of us could make the difference.

Consisting mostly of recirculating scrapped metals, 80% of all the metals that have ever been mined are still at work.

The most important thing about Spaceship Earth - an instruction book didn't come with it.

Every time man makes a new experiment he always learns more. He cannot learn less.