When we work all over the planet, it's mostly poor and black and brown and young people, because that's mostly what the world [environmentalism] is.

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)

When someone can love without judging, he is truly wise.

In every moments of life, we're all having up and down.If there are no up or down, it means we didn't have any life.

I wouldn't really call myself a feminist. I obviously want equality and equal opportunities to the men.

The individual and the race are always moving, and as we drift into new latitudes new lights open in the heaven more immediately over us.

Childhood has no forebodings; but then, it is soothed by no memories of outlived sorrow.

as one grows older, one realizes how little one knows about any relationship, or even about oneself.

The unspoken word is capital. We can invest it or we can squander it.

I'm just warning you here: Don't anybody ask about the president's religion! Don't even get close to going there. Don't do it. That is a forbidden area. You cannot even ask about it.

One of the greatest gifts a parent can give a child is to help them find their talents.

Our great modern Republic. May those who seek the blessings of its institutions and the protection of its flag remember the obligations they impose.