The more you go on, the less you need people standing between you and the animal and the camera waving their arms about.

No one will protect what they don't care about, and no one will care about what they have never experienced.

The truth is: the natural world is changing. And we are totally dependent on that world. It provides our food, water and air. It is the most precious thing we have and we need to defend it.

Instead of controlling the environment for the benefit of the population, perhaps we should control the population to ensure the survival of our environment

What humans do over the next 50 years will determine the fate of all life on the planet.

Anyone who believes in indefinite growth on a physically finite planet is either mad or an economist

The World is full of wonders, but they become more Wonderful, not less Wonderful when Science looks at them.

The question is, are we happy to suppose that our grandchildren may never be able to see an elephant except in a picture book?

How could I look my grandchildren in the eye and say I knew what was happening to the world and did nothing.

Bringing nature into the classroom can kindle a fascination and passion for the diversity of life on earth and can motivate a sense of responsibility to safeguard it.

I just wish the world was twice as big and half of it was still unexplored.

Be courageous enough to learn from failures and bold enough to begin anew.

The author said Frederick Douglass described himself as a "graduate" of slavery with the marks of his diploma on his back.

It doesn't cost anything more to be nice.

The reticent volcano keeps His never slumbering plan - Confided are his projects pink To no precarious man.

I think hell's a real place where real people spend a real eternity.

Life is a partial, continuous, progressive, multiform and conditionally interactive self-realization of the potentialities of atomic electron states.

As I've been open with my faith, there's a consistency that almost disarms people. They know what they're going to get when they see me. They know what they're going to get when they talk to me.

Motivation is everything. You can do the work of two people, but you can't be two people. Instead, you have to inspire the next guy down the line and get him to inspire his people.

You see, if you are 30 years ahead of your time, you will always have difficulty speaking with the bosses in the industry. They are too conservative.

The beginning of wisdom is the knowledge of folly.