The fundamental issue is the moral issue.

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.

I went to a bookstore and asked the saleswoman where the Self Help section was. She said if she told me it would defeat the purpose.

Children are already accustomed to a world that moves faster and is more exciting than anything a teacher in front of a classroom can do.

As an actor, you think you have to go really far and deep and cry and yell to be good in a scene. Sometimes that's not the point.

We have more people in jail than any other country in Earth, disproportionately Latino and African-American.

I think the Mormon Tabernacle Choir is as great as it is because it's become it's a labor of love. They love what they do.

We are not what we are, nor do we treat or esteem each other for such, but for what we are capable of being.

My own suspicion is that a stand-alone artificial mind will be more a tool of narrow utility than something especially apocalyptic.

Walk neither faster nor slower than your own soul. Because it is your soul that will teach you the usefulness of each step you take.

I had been in so many towns and cities in America with John Kennedy, but I was not with him in Dallas, Texas, on November 21, 1963.

We've seen many Black men lose their life over the past couple of years. Not only just heard about it.