It's off the charts - and if you don't believe the scientists, ask the insurance industry, the people we pay to analyze risk in our society.

Climate change is the single biggest thing that humans have ever done on this planet. The one thing that needs to be bigger is our movement to stop it.

The technology we need most badly is the technology of community, the knowledge about how to cooperate to get things done.

Very few people on earth ever get to say: 'I am doing, right now, the most important thing I could possibly be doing.' If you'll join this fight that's what you'll get to say

what you do every day is what forms your mind and precious few of us can or would spend most days outdoors.

In 50 years, no one will care about the fiscal cliff or the Euro crisis. They'll just ask, "So the Arctic melted, and then what did you do?"

Global warming is no longer a philosophical threat, no longer a future threat, no longer a threat at all. It's our reality.

Advent: the time to listen for footsteps - you can't hear footsteps when you're running yourself.

We've been given a warning by science, and a wake-up call by nature; it is up to us now to heed them.

The real negotiation is between humans on the one hand and chemistry and physics on the other. And chemistry and physics, unfortunately, don't bargain.

We can either save the planet from catastrophic warming, or protect fossil fuel CEOs. Not both. Do the math(s)

Mom, Dad, I’m fourteen, I see what the world is like. And, no, I did not get this from the psychologist...I came to this understanding on my own, from what I really see in myself and about life.

Hatred has no place in your heart. Empathy does.

With hardly any effort at all, she made me feel special. Just like all the other people she toyed with.

I'm confident that people will be able to relate to my music.

I went to law school. I found it interesting for the first three weeks.

I took a photo of us, mid-embrace. When I am old and alone I will remember that I once held something truly beautiful.

His thoughts inhabit a different plane from those of ordinary men; the simplest interpretation of that is to call him crazy.

Birds make great sky-circles of their freedom. How do they learn it? They fall and falling, they're given wings.

Mr. President, the only thing that stops a bad guy with a nuke is a good guy with a nuke.

Diffidence is a sort of false modesty.