The earth is a tremendous gift. There is nothing else like it in the known universe. I want to leave it the way I found it.

When I was a kid, we never heard of smog, ozone depletion, acid rain, green house gasses.

But the "wise" person understands something else— that we are all connected and, therefore, his or her own happiness must include the happiness of others.

The people of the future will say, 'meat-eaters!' in disgust and regard us in the same way that we regard cannibals and cannibalism.

Coming back to a television series puts you back in the limelight and gives you a platform for your ideas. If you're not acting on a series, you don't get the ability to communicate to people.

We're the only species that have crapped up the planet and the only species that can clean it up.

When we realize we can make a buck cleaning up the environment, it will be done!

If we had a hydrogen economy worldwide, every nation on earth could create its own energy source to support its economy, and the threat of war over diminishing resources would just evaporate.

We don't have to sacrifice a strong economy for a healthy environment.

We should be able to support our own economy within our own borders.

Practically every environmental problem we have can be traced to our addiction to fossil fuels, primarily oil.

You are a great soul with a great spirit.

You are still the colour of my blood. You are my blood. When I look in the mirror it’s not my own face I see. Your body is twice. Once you once me. Can I be sure which is which?

The time you spend alone with God will transform your character and increase your devotion. Then your integrity and godly behavior in an unbelieving world will make others long to know the Lord.

In my life, I don't need to have my face plastered everywhere. It's not really something I want.

The most political thing you can do is be yourself

Prayer concerns God, whose purposes and plans are conditioned on prayer. His will and His glory are bound up in praying.

I don’t like anything that’s got to be. I want to know why.

I never expected the White House to be warm, and the artwork on the walls was extraordinary. I am a fan of the Louvre, but being there it was almost just as good.

What is it about us human beings that we can’t let go of lost things?

I don't think of any sentence as a "one-liner", but I do pay attention to how people actually speak when they are being funny. Rhythm is key.