“I strongly believe in the separation of church and state. But freedom of religion does not mean freedom from religion, there is a better way.”

Our new technologies, combined with our numbers, have made us, collectively, a force of nature.

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

Civil disobedience has an honourable history, and when the urgency and moral clarity cross a certain threshold, then I think that civil disobedience is quite understandable, and it has a role to play.

The will to act is a renewable resource.

The struggle to save the global environment is in one way much more difficult than the struggle to vanquish Hitler, for this time the war is with ourselves. We are the enemy, just as we have only ourselves as allies.

We can believe in the future and work to achieve it and preserve it, or we can whirl blindly on, behaving as if one day there will be no children to inherit our legacy. The choice is ours; the earth is in balance.

Consider what kind of car you get. Buy cars and other products that have the least impact environmentally.

I have always been fascinated with those who try to look over the horizon and see things that are coming at us.

The good news is, we have everything we need now to respond to the challenge of global warming. We have all the technologies we need, more are being developed…. But we should not wait, we cannot wait, we must not wait.

Our world faces a true planetary emergency. I know the phrase sounds shrill, and I know it’s a challenge to the moral imagination.

A zebra does not change its spots.

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

At some point, a false belief collides with physical reality.

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

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

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.

It is time to realize we are too great a nation for small dreams. We’re not – as some would have us believe – doomed to an inevitable fate.

Being tolerant does not mean that I share another one’s belief. But it does mean that I acknowledge another one’s right to believe, and obey, his own conscience.

If you choose bad companions, no one will believe that you are anything but bad yourself.

Confidence is believing in yourself. Arrogance is telling others you ‘re better than they are. Confidence inspires. Arrogance destroys.

The reason my comments always get you into your feelings is because deep down, you know what I am saying is true.

The believer is happy. The doubter is wise.

None believes in his own death. In the unconscious everyone is convinced of his own immortality.

I am willing to be my biggest, bestest, most powerful self.