There is no question that climate change is happening the only arguable point is what part humans are playing in it.

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.

You know that I know that I know that you know that I know my path.

A grateful person is rich in contentment.

The church is not made up of spiritual giants; only broken men can lead others to the cross.

There are moments in business and in life when you have to say, "Failure is not an option."

What are you afraid of then? Not Being able to see, I think not seeing because your obsessed by something that blots out the world.

What is beautiful is moral, that is all there is to it.

I'd like to do Harvey again. I did it two years ago with Helen Hayes in New York. It was a joy. I was so glad to do it again because I never thought I did it right the first time.

There is this quality, in things, of the right way seeming wrong at first.

I don't think I'm a millionaire, but I'm comfortable.

We think people who make a lot of income and have a lot of net-worth are pretty well served.