Many individuals are doing what they can. But real success can only come if there is a change in our societies and in our economics and in our politics.

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.

To look at something as though we had never seen it before requires great courage.

Mutual respect! That's what it takes to be friends.

The only sure way to avoid making mistakes is to have no new ideas.

Relativity is a purely scientific matter and has nothing to do with religion.

Oh that was your girl? I thought I recognized her.

It's strange for my friends when they see me on TV and in magazines, because the person that they see doing interviews and pictures on the red carpet is not the person that they know.

Heaven is a house full of miracles; yea, of spectacles and images of free grace.

Madame Kovarian: The anger of a good man is not a problem. Good men have too many rules. The Doctor: Good men don't need rules. Today is not the day to find out why I have so many.

It pleases me that people can be interactive

There is an immediate payoff to intelligent design: it destroys the atheistic legacy of Darwinian evolution. Intelligent design makes it impossible to be an intellectually fulfilled atheist.