When fear displaces reason, the result is often irrational hatred and division.

When it comes to climate, we can all make a big difference.

The fate of mankind, as well as religion, depends on the emergence of a new faith in the future. Armed with such a faith, we might find it possible to resanctify the earth.

We are running out of time, we must have a planetary solution to a planetary crisis.

Our way of life is at stake, our grandchildren are at stake, the future of civilization is at stake.

Take it from me, every vote counts.

Take it from me: Elections matter.

The planet is in distress and all of the attention is on Paris Hilton.

When you have the facts on your side, argue the facts. When you have the law on your side, argue the law. When you have neither, holler.

The will to act is a renewable resource.

In order to solve the climate crisis, we need to solve the democracy crisis.

Every nation has a moral obligation to safeguard the future.

Airplane travel is nature's way of making you look like your passport photo.

A zebra does not change its spots.

In a time of darkness, you don't curse the darkness, you light a candle.

We're operating this planet like a business in liquidation.

Each and every one of us can make changes in the way we live our lives and become part of the solution [to climate change]

A free press is the immune system of representative democracy.

I'm not trying to top anything. I'm trying to be useful, to play a positive role, to serve the public interest.